Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa21a976d82963f8…

MALICIOUS

PDF

63.4 KB Created: 2020-08-19 04:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a8c1200d02b722c54cc2780df4f1a013 SHA-1: 6faad0cd8959871e7831971988f0caaa2ccd0400 SHA-256: aa21a976d82963f860665b009059e94021b129918b125ada325dbaa11b015bd4
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a song title, leading to a link farm of other PDFs. This suggests an attempt to lure users to malicious infrastructure, potentially for SEO poisoning or further exploitation. The presence of a callback lure heuristic further supports a phishing or scam pretext. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=chunariya+lele+aiha+dj+remix+song In PDF document text
    • http://files.exxar1.com/uploads/1/3/1/3/131398526/mofudosum.pdfIn PDF document text
    • http://remux.hearthisspace.com/uploads/1/3/1/3/131379639/8745783.pdfIn PDF document text
    • http://viwixofu.seeyoudowntheroad.org/uploads/1/3/1/4/131438188/8589648.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6352/5026/files/39712975551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45035229099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/wozejakukepinepipokados.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5551/2738/files/jotusizidanoditugaxon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0940/1254/files/buxevupakerawuvirijefetig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3356/5096/files/duludowaligupad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/61353518272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4116/8283/files/jatenikakezepufod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/destilacion_por_arrastre_de_vapor_practica.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8C 5392 bytes
SHA-256: 17c64bd0047c18d66c3f1fa91d9ee6471f4ae0f3fe5374bc51c94bebbc463c1e
font_01_sfnt_off000081b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B9 2092 bytes
SHA-256: 6e5de5c6bcb7fdd8c5ca0d25823a8f80e6c764803c1b732dbc9c425a5c0f8ea5
font_02_sfnt_off00008b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5F 14588 bytes
SHA-256: fd85de1b943dbd9fe191bce76a9c30460c24e916c4e4a77ff70e0d8ae74e3624
font_03_sfnt_off0000b997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB997 16060 bytes
SHA-256: bb4620ae2308066493f479cb0495314a41e91f5b0bfb2a754d9bad2ef34af03d
font_04_sfnt_off0000ce69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE69 9912 bytes
SHA-256: 389096b91b9359f8617117eb9c4fc01e58dcd5110c6abe9f7e1dc46248cb5056