Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a16416169e05961…

MALICIOUS

PDF

118.5 KB Created: 2020-09-12 13:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d1d2cb80b014b7b743825250e422536 SHA-1: c45170b6af306e3b1d56316be944806c960e18a5 SHA-256: 4a16416169e059612aded1086e77371efdcce6a720696380e5b3ce592bac58cc
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link farm and a redirector link, both pointing to infrastructure commonly used for distributing malicious content. The document body, though heavily obfuscated, contains the string 'db legends hack android' and a URL that aligns with the advance-fee scam lure identified by heuristics. The primary attack pattern involves luring the user to a malicious URL under the guise of a game hack, which is a form of social engineering.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.link/pify?keyword=db+legends+hack+android In PDF document text
    • http://files.songwritingcharity.org/uploads/1/3/1/8/131856723/sixifix_zigemu_lubekazadodima_kavoraduf.pdfIn PDF document text
    • http://files.lilibarbieri.com/uploads/1/3/0/7/130775413/fabiziw.pdfIn PDF document text
    • http://files.jackleamyteacher.com/uploads/1/3/0/7/130739718/abca9c7d539d8.pdfIn PDF document text
    • http://files.medfieldsel.com/uploads/1/3/1/4/131438111/539865.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/decf6f_f2f00adf8ac54450af06b837774c17ac.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8bbd7_abf9bfbacbd1461fbd20be774ec0d510.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3e5d97_217263185800433b88a87536daf5cd01.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bfbc46_5d0ea230b0734c9d9318654719e77731.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0dcf4b_4e1fd77f50834a9c998a7d9f74ac53e2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7480/4126/files/hanon_60_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2903/5158/files/26996052677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3236/0613/files/kiwalivev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/9127/1320/files/xexopijulapasen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8158/7095/files/59236916483.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9d24cb_d725499628874659884b2af36e14c2c1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/338562_4776504b450144cea169172e08aafd24.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b2ba6b_2c5bb718353f449d99913eef7d92b2f6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/762c1a_66633e260e464bd48c3c98cbf6e29797.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/921909_bc3070385b2c4051897cd0bd0d264f39.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AC9 5404 bytes
SHA-256: 956b365425ec09bebaf950136ca731e4636de56c116ad6b90f91344ed7f0ef30
font_01_sfnt_off00019d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D25 15156 bytes
SHA-256: 3581707ec1bcb187027e423c117b340e1752ecb4c86e731cbc72397c344af026