Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8cc9c941435194…

MALICIOUS

PDF

51.8 KB Created: 2020-08-05 13:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92907005a14cb85c1dcdc5d9baa98aa8 SHA-1: 8d4c0eb677337467e60f9b7cf77ce18ab1eb1a0c SHA-256: 1a8cc9c941435194114ded6b538686e804a81deef683f08a886b8a3c8d974a4f
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=absorcion+atomica+de+llama+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to lure users to malicious infrastructure. The presence of many Shopify-hosted PDF links further supports the SEO link farm heuristic.

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=absorcion+atomica+de+llama+pdf
    • http://ziwukis.madisomeone.com/uploads/1/3/1/3/131384635/pobol.pdf
    • http://suzad.ppcomachining.com/uploads/1/3/0/8/130874359/9077974.pdf
    • http://files.bagwelldesigns.com/uploads/1/3/2/6/132682076/6561509.pdf
    • http://files.ionaleons.com/uploads/1/3/1/0/131069897/wikuzegixekuf.pdf
    • http://files.bethlehemctcommunitygarden.org/uploads/1/3/1/8/131858916/9150946.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4328/files/42678935801.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6929/files/10172792938.pdf
    • https://cdn.shopify.com/s/files/1/0434/6445/8405/files/descendants_2_evie_s_fashion_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/9269/5458/files/zabirevorosifemewujode.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/50755990.pdf
    • https://cdn.shopify.com/s/files/1/0434/5528/3366/files/pisokopubores.pdf
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/liresetedurixakubisajap.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3173/files/fewopanu.pdf
    • https://cdn.shopify.com/s/files/1/0440/7004/3813/files/fawesusifelan.pdf
    • https://cdn.shopify.com/s/files/1/0434/5387/4329/files/hse_risk_assessment_template.pdf
    • https://cdn.shopify.com/s/files/1/0439/3933/2251/files/kapezebeguwejusokire.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujufizolotedugogu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9222/0840/files/siruwirawemubawutelebuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/8136/6693/files/ropiposu.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_off00007e93.bin
5daa09671972876ba8f6a099dd59d7da58d1e4ed033fbde3c96be5de51ca4dc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E93 5220 bytes
font_01_sfnt_off0000901f.bin
f922549003b674646b55d050df289f2c48538df0de3a818a967ec4ee446db5d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x901F 10924 bytes
font_02_sfnt_off0000b3c8.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C8 4324 bytes