Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4c44d81010f3ea2…

MALICIOUS

PDF

47.2 KB Created: 2020-08-17 11:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7aaebac34833e739db2bd7ffb544bca1 SHA-1: fc1c110c4cd58bc0149060d106feeebd34795ffc SHA-256: a4c44d81010f3ea2966c7da518b51b5ac61da6fbba71544db6ad896c1fb03193
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=uc+browser+opera+mini+free'. This URL is embedded within the document body, suggesting a social engineering lure to trick users into clicking it. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many hosted on Shopify, likely for SEO manipulation or to obscure the malicious redirector. No scripts were extracted from this sample.

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.com/pify?keyword=uc+browser+opera+mini+free In PDF document text
    • http://dutisu.pagesustainability.com/uploads/1/3/1/8/131856917/3137921.pdfIn PDF document text
    • http://jodigop.bluesteeltm.com/uploads/1/3/1/4/131482952/rorosamuped.pdfIn PDF document text
    • http://files.aaronflaaen.com/uploads/1/3/2/6/132682802/ledaja.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/1/0441/0349/9928/files/vakevekivilogerolog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9846/2624/files/60105182746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/75882890423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/bhagwa_rang_dj_mein.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0537/0787/files/67447173440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/1285/2632/files/bilstein_shock_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9656/4131/files/mepotaxupofaragefekakewiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6001/0906/files/format_usb_key_ntfs_allocation_unit_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/minecraft_seed_map_ps4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/91603536789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/gakutadadilegidulexajelum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/english_words_with_telugu_meaning.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A30 6588 bytes
SHA-256: 4e1a9c4cb32f1bc4ff176ae4dc1460c31b2d267bf2def0252f23ad2731e7be72
font_01_sfnt_off00007aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA9 5352 bytes
SHA-256: 49a4471b352791b0fb58e0f37007955c5c62ac0902bcb0bcae11b0c058fbff4a
font_02_sfnt_off00008ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCD 10108 bytes
SHA-256: 0a615d33e505780a104c98fe309572b501a94132bc3e79a07fdd4a3cba5249c2