Malicious PDF — malware analysis report

Static analysis result for SHA-256 903020a8e079cdb1…

MALICIOUS

PDF

36.1 KB Created: 2020-08-10 21:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0ade0b344c03709752f4c48888db2a1 SHA-1: afa9d83a673ecb2f190f330192acb2a827adee65 SHA-256: 903020a8e079cdb1a2146ea82712bc2c170272b2989c44bb24866af123de9c15
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as a legitimate download for an Adobe PDF converter. The primary malicious link, 'https://ttraff.cc/pify?keyword=adobe+pdf+converter+download+apk', redirects to potentially harmful content. The ML classifier strongly indicated maliciousness, and the presence of numerous external links, many hosted on Shopify, suggests a link farm for SEO manipulation or traffic redirection.

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=adobe+pdf+converter+download+apk
    • http://files.roofing-waterproofing.com/uploads/1/3/1/4/131407042/9006a17f4.pdf
    • http://kuviguf.wickedwomeninwords.com/uploads/1/3/2/8/132814930/6230335.pdf
    • http://gusop.lovingthemother.com/uploads/1/3/1/0/131069934/ecae686402.pdf
    • http://files.alexatamianphotography.com/uploads/1/3/1/3/131398406/8593783.pdf
    • http://xetaji.opulenceboutiquewollongong.com/uploads/1/3/1/3/131398020/7de9c57d3d5.pdf
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/nadodedebufoxubisazo.pdf
    • https://cdn.shopify.com/s/files/1/0439/7367/3118/files/54812755864.pdf
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/vokura.pdf
    • https://cdn.shopify.com/s/files/1/0446/4531/8819/files/extreme_weight_loss_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0429/0111/0940/files/97112795982.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0064/files/24888456246.pdf
    • https://cdn.shopify.com/s/files/1/0432/4950/0315/files/pebugokozitipipediperej.pdf
    • https://cdn.shopify.com/s/files/1/0433/3754/7929/files/fejowinoxaxinuxoxomapudaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/judea_pearl_causality_models_reasoning_and_inference.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2791/files/abraham_maslow_y_su_teoria.pdf
    • https://cdn.shopify.com/s/files/1/0433/1955/8299/files/python_mobile_app.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/lenefareramipepizebanox.pdf
    • https://cdn.shopify.com/s/files/1/0435/6499/0632/files/96150702837.pdf
    • https://cdn.shopify.com/s/files/1/0440/0037/9038/files/my_imortal_sheet_music.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_off00004f3f.bin
30c94a549f0152b3e72a6ac82217a4a27cc34b45d63230a526a41034d83755a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F3F 5316 bytes
font_01_sfnt_off00006170.bin
364dd087130d5ff030f7cec089d15933f79afd2cb62ec175b9ff6b1e73b74e44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6170 9940 bytes

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