Malicious PDF — malware analysis report

Static analysis result for SHA-256 547e5f1f6a7199ae…

MALICIOUS

PDF

47.4 KB Created: 2020-08-05 23:27:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 122c426a005db4490c2801c4f9ccc89b SHA-1: 73e34ba194f43916c427a9822938cc10f5d4eb57 SHA-256: 547e5f1f6a7199aed57627e659decc63d6ae37a557642840271de5210a70e57b
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the target URL and references to IELTS reading tests, suggesting a lure. The primary malicious indicator is the PDF_MALICIOUS_REDIRECTOR_LINK heuristic pointing to 'ttraff.cc'. No scripts were extracted, but the PDF structure and embedded URLs are sufficient for this assessment.

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=ielts+reading+actual+test+vol+4+pdf
    • http://files.northerncherokeenation.com/uploads/1/3/1/3/131380814/noxasuminano-soxamo.pdf
    • http://files.oakshot.com/uploads/1/3/1/4/131438228/fubaz.pdf
    • http://files.thectejournal.com/uploads/1/3/0/8/130874575/1807383.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/varobezizegixatisa.pdf
    • https://cdn.shopify.com/s/files/1/0440/9887/9640/files/jogemasidizobelod.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/8582239711.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/65698375922.pdf
    • https://cdn.shopify.com/s/files/1/0430/1389/8403/files/47479748242.pdf
    • https://cdn.shopify.com/s/files/1/0438/4191/2997/files/gumat.pdf
    • https://cdn.shopify.com/s/files/1/0431/7862/3138/files/jafub.pdf
    • https://cdn.shopify.com/s/files/1/0437/7378/8321/files/lejakanukuzafaziliran.pdf
    • https://cdn.shopify.com/s/files/1/0428/1240/7967/files/90574505091.pdf
    • https://cdn.shopify.com/s/files/1/0435/1941/0335/files/19334911378.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_off0000533a.bin
92528134438fae0788f6e98edb2d87fa7ca6d983140133b3472d86e9fecd7535		 pdf-font-stream PDF embedded font (sfnt) at offset 0x533A 5292 bytes
font_01_sfnt_off0000654d.bin
e725ebbbbd817097acd6dda79939a092a67fc3e2e9715f4ccb0e453ffaf822e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654D 13852 bytes
font_02_sfnt_off00008d74.bin
5338b60dac2ddcc9fbf81734882903060897ff8c18563aad6864a581beec55c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D74 16068 bytes
font_03_sfnt_off0000a219.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA219 4324 bytes

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