Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa534d0d8de73af3…

MALICIOUS

PDF

33.5 KB Created: 2020-08-16 13:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b6f88130ee62da93d4224c564fd81ae0 SHA-1: 88558a2769ad234da84388bc078d347f7fac4736 SHA-256: aa534d0d8de73af3bdac9847b9e88e5ab23bd5868e81f5be02329de95529dd9b
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to a popular entertainer, likely to entice users to click the embedded links. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a probable SEO poisoning or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.cc/pify?keyword=ashish+chanchlani+despacito In PDF document text
    • http://biriva.yoder-bros.com/uploads/1/3/0/7/130776031/5632035.pdfIn PDF document text
    • http://files.buhundpuppies.com/uploads/1/3/2/6/132681164/2198156.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/poxopoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1368/4891/files/29798555222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/85587787952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/xxxviii_roman_numerals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/25708041350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/57738181173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/hitman_blood_money_compressed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0930/8829/files/jejajupivemexev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7334/7488/files/5076527057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4283/9455/files/22312181107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9126/3649/files/aprendiz_de_brujo_pnl_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4765/6351/files/berne_convention_intellectual_property.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47BF 5052 bytes
SHA-256: 34d6352220009d9517566265267650d3cea3623955db26a7b34e3c8dd48305e9
font_01_sfnt_off000058d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58D7 9604 bytes
SHA-256: 465b4321978b2584a7d027fd089212db96cce00538f4f6605feb7fcd29214693

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