Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd363b62fbb7725…

MALICIOUS

PDF

58.5 KB Created: 2020-08-09 12:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5877f9691f29cadf704e15d8166cf453 SHA-1: a1dd9d25ba50b65463cedd789fb647189f69ca0d SHA-256: 4bd363b62fbb77250cd20e29523e5c57ed73c951070ec521c0f392d2d505efa8
202 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic identifying it as a malicious redirector. The primary malicious URL is https://ttraff.ru/pify?keyword=alphabet+animals+flash+cards+pdf, which is likely used to redirect users to a malicious site. Another heuristic indicates a PDF link farm, with https://cdn.shopify.com/s/files/1/0440/9350/5688/files/92260568980.pdf being the first identified link. The document body, though heavily obfuscated, contains text suggesting a lure for 'alphabet animals flash cards pdf'.

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.ru/pify?keyword=alphabet+animals+flash+cards+pdf In PDF document text
    • http://files.morsepto.com/uploads/1/3/0/7/130776489/2062283.pdfIn PDF document text
    • http://files.standrewbythelake.com/uploads/1/3/2/8/132814355/kodudutapid-sipizezuw-taniviweg-xetopebuvonuge.pdfIn PDF document text
    • http://files.yogachicanada.com/uploads/1/3/2/6/132681556/cb7cf27.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9350/5688/files/92260568980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4832/1692/files/gadovekogabasesejasof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2107/2541/files/aha_bls_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6064/8343/files/nujotekunefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/30345235973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4134/2108/files/berizavejuxedonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7703/4399/files/77091057547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1723/8685/files/3252908004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4832/1692/files/613898374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7075/7795/files/affliction_warlock_pvp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/patojedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1641/files/kesasufalafasapesukakujik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/xojevapizol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9552 5204 bytes
SHA-256: 93b167615ee5512bc6451022807ab043aa4c6e98e717ddc2da47ebb03ca33215
font_01_sfnt_off0000a6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6BE 12420 bytes
SHA-256: 6eaad185d39c8fdc2a0e5d80c79d9b8d1977bf449eaf802582c712f01dbe5d1a
font_02_sfnt_off0000ce96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE96 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333