Malicious PDF — malware analysis report

Static analysis result for SHA-256 609687463728bdb2…

MALICIOUS

PDF

170.7 KB Created: 2020-08-07 07:23:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9963fb758328c8735a961d6bef7fb08 SHA-1: e1247d003e2b554cc0a9dd781abb1b23d7d48076 SHA-256: 609687463728bdb2d103692d8defaac49f070b7b8d98c0c645881ca1333bcff1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=pseudomonas+aeruginosa+infection+pdf
    • http://files.spartanburgband.org/uploads/1/3/1/0/131070508/zijosamiwetematefu.pdf
    • http://files.foundationforpoliticsandleadership.org/uploads/1/3/0/7/130739076/mulejugulivokadu.pdf
    • http://files.spacetigertattoos.com/uploads/1/3/0/7/130739951/movojetinodot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/2293/4435/files/94346017569.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/faxaxeripifamogezawobud.pdf
    • https://cdn.shopify.com/s/files/1/0436/9213/0458/files/26612861691.pdf
    • https://cdn.shopify.com/s/files/1/0431/6925/1492/files/17302515501.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/fikekazaforopejefis.pdf
    • https://cdn.shopify.com/s/files/1/0441/2456/9752/files/93215950367.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/najanamodavuxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1909/8523/files/tilutudedejisimusapiwotaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89462818099.pdf
    • https://cdn.shopify.com/s/files/1/0438/0108/4064/files/nuweresidunesimal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77084518355.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024d84.bin
0883d66c3639ad814074ed6875ef70e64f73d6cc78e13f031881d0c1249054e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24D84 5328 bytes
font_01_sfnt_off00025f82.bin
716638905b113f74753b04011a3a2c45efe1f098dc13ffedd8543508a0d0afc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25F82 15180 bytes
font_02_sfnt_off00028ec4.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28EC4 4324 bytes

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