Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3211b49e424fbf3…

MALICIOUS

PDF

39.3 KB Created: 2020-08-15 05:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a05cd9ae5b6a0b6a432dbf20828e865 SHA-1: cc46164e115848333c5840a28dd0436390653caf SHA-256: a3211b49e424fbf30149b2d5e9fc9c62fba3b9fd569f1a63808f81f550009193
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to lure unsuspecting users to malicious infrastructure. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the attack vector. No scripts were extracted from this sample.

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=cambridge+ielts+listening+test+3+answers
    • http://files.delphieng.com/uploads/1/3/1/6/131606733/40671bbb6.pdf
    • http://xipema.oshaebest.com/uploads/1/3/2/8/132814930/d97844.pdf
    • http://files.carriekellerequineart.com/uploads/1/3/0/8/130813413/9237435.pdf
    • http://files.ccw-couchscedarworks.com/uploads/1/3/1/3/131383380/8414825.pdf
    • https://cdn.shopify.com/s/files/1/0437/2925/6602/files/class_10_maths_book_cbse.pdf
    • https://cdn.shopify.com/s/files/1/0431/9445/0078/files/beautifulsoup_get_text.pdf
    • https://cdn.shopify.com/s/files/1/0438/8667/4088/files/62796220910.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/copilot_bike_trailer.pdf
    • https://cdn.shopify.com/s/files/1/0431/0794/2549/files/jokositadakiruroj.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8168/files/antibiotic_prophylaxis_in_surgery.pdf
    • https://cdn.shopify.com/s/files/1/0432/7633/7318/files/zodat.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/humulin_r_500.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8170/files/japam.pdf
    • https://cdn.shopify.com/s/files/1/0434/4102/9276/files/axiomas_de_zurique_completo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/35451484734.pdf
    • https://cdn.shopify.com/s/files/1/0432/2036/9567/files/33137400946.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ad7.bin
1e3fe93a63e7eed9f201ba5af83287ce4840c4e2f2a0da0edbab988c39aa09e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD7 5444 bytes
font_01_sfnt_off00006d55.bin
8062669a9fd4877c8ef99827c0107ef7a2ed9d33fa5fdf970481f62156f7f9d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D55 10316 bytes

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