Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6d3502dfb8a5777…

MALICIOUS

PDF

51.8 KB Created: 2020-08-08 03:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1efe4f552ca558ab3a7a23695d656a5 SHA-1: 6c3fbdc7a1983cb6d909c9a9aa2fab5e1d35d0d4 SHA-256: a6d3502dfb8a5777e7e3713e36608041f0b5b87f7193a4e56c1b9c73e0d310b7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=secretarial+abilities+material+in+english+pdf'. This URL is likely part of a phishing or scam campaign designed to redirect users to malicious content. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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=secretarial+abilities+material+in+english+pdf
    • http://files.porchlightapothecary.net/uploads/1/3/1/6/131637131/mofowuwujegadokof.pdf
    • http://files.fascinobespoke.com/uploads/1/3/0/9/130969708/4477173.pdf
    • http://files.daretodreamweddingswi.com/uploads/1/3/2/3/132302951/765972dbcf.pdf
    • http://juzadi.anythingbyaustin.com/uploads/1/3/1/0/131070993/6279937.pdf
    • http://files.animatorssketchclub.com/uploads/1/3/1/4/131453588/nizokekananilu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/2888725834.pdf
    • https://cdn.shopify.com/s/files/1/0431/5329/3469/files/bevesawozisonemabozetewik.pdf
    • https://cdn.shopify.com/s/files/1/0432/1312/7835/files/rovaridebinol.pdf
    • https://cdn.shopify.com/s/files/1/0431/4693/6482/files/werinoxanumuwenavinadok.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/539588235.pdf
    • https://cdn.shopify.com/s/files/1/0434/7992/4902/files/95788137170.pdf
    • https://cdn.shopify.com/s/files/1/0436/3495/0304/files/australian_visa_form_1419.pdf
    • https://cdn.shopify.com/s/files/1/0438/0521/2832/files/1745972914.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1702/files/4782373432.pdf
    • https://cdn.shopify.com/s/files/1/0433/8407/8503/files/risk_analysis_in_software_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/lolesujanovot.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006af0.bin
47032bc5ed838054655d527278d241d1e992dc7fa9c30f970e9cf2ce381a8cd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF0 5812 bytes
font_01_sfnt_off00007e7e.bin
5e067315a2bd9524b6254977960f062bb129990ed69868068e29b4596197f3c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7E 2320 bytes
font_02_sfnt_off000088d1.bin
64d21de58eac3c9ecb46f4c6d667e9a6e1447c658e5b1fdba8a58aed5bb2c5f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D1 10164 bytes
font_03_sfnt_off0000ab82.bin
a349519ccbdbca3d75704c2becf615ab37801eb1543272228454131dceb83acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB82 16224 bytes

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