Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b75d320b3b1a02…

MALICIOUS

PDF

44.3 KB Created: 2020-08-02 03:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9da282ceadcdb51b2a767a359ecff77f SHA-1: e0291e01c808e6dc5713aa6f8655a46576b4519d SHA-256: 49b75d320b3b1a02ed50cf8bd6f59205ebac92e1036225893cc463aa62937bbd
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, including a critical redirector link to ttraff.cc, indicating a phishing or redirection attempt. The document body, though heavily obfuscated, contains the same redirector URL. The presence of numerous PDF links, many hosted on Shopify, suggests an attempt to create a link farm for SEO poisoning or to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=sample+examination+iv+ap+calculus
    • http://files.stephenlotus.com/uploads/1/3/1/4/131438308/3668112.pdf
    • http://files.eddiejosemorales.com/uploads/1/3/2/8/132815019/texikibowotaz_lurinadewi.pdf
    • http://files.danhammettceramics.com/uploads/1/3/1/0/131071167/740062.pdf
    • https://cdn.shopify.com/s/files/1/0437/1064/4377/files/desofu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kilezolesosobusafo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5805/files/bofoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdf
    • https://cdn.shopify.com/s/files/1/0437/0294/3909/files/bosezewabupemi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7147/0742/files/tifofutejisima.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/how_to_use_act_ffxiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/xekuluxir.pdf
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/90351785121.pdf
    • https://cdn.shopify.com/s/files/1/0446/7536/7065/files/physics_james_walker_3rd_edition.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000620e.bin
5826674a7c6a19c5273daaedd4ba58e9d607fa616d43e8f79df19895d0db2cda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x620E 5096 bytes
font_01_sfnt_off00007351.bin
86ad160dc6d0e20964236d1892b18689811b760703006cf83a068113a1b131b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7351 10252 bytes
font_02_sfnt_off0000964c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x964C 4324 bytes

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