Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdfb4699e2862c85…

MALICIOUS

PDF

47.9 KB Created: 2020-08-26 19:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f45c623365bd6a2e22eeaedb02633985 SHA-1: 57d98836f80e642f61b65b44352f9a20fea64640 SHA-256: fdfb4699e2862c85713a5e10d094162b2be3ddda2cd78a5695c1efeff1215852
152 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 pointing to Shopify domains, suggesting an attempt to manipulate search engine results or distribute content. Crucially, one link directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same redirector URL and a list of other URLs, reinforcing the malicious intent. No scripts were extracted from this sample.

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.me/pify?keyword=remove+double+chin+photoshop
    • http://files.colleenitani.com/uploads/1/3/1/3/131383743/6863405.pdf
    • http://baraf.christieriehl.com/uploads/1/3/1/4/131438096/felezin.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/justified_imdb_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7552/files/catechism_of_catholic_church_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0448/9386/4091/files/best_lottery_website_templates.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/wevuwesawuvoxumojujori.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/pugerolajexoxogadep.pdf
    • https://cdn.shopify.com/s/files/1/0460/3576/3364/files/mewudadalare.pdf
    • https://cdn.shopify.com/s/files/1/0434/0963/7533/files/strength_of_materials_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0430/5459/6250/files/belavibukabosebugaremeneb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30698029692.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75901524911.pdf
    • https://cdn.shopify.com/s/files/1/0461/9190/2869/files/ccleaner_apk_para_pc.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/sogulukudodom.pdf
    • https://cdn.shopify.com/s/files/1/0437/4586/9975/files/total_conquest_hack_mod_apk_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/muporoxumakamefor.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_off00006fe8.bin
d7d013408685d1bf1dc1dee1d90893ea0daaa0e4e5db9584292ef4d00e01cff0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE8 3304 bytes
font_01_sfnt_off00007bcc.bin
e4503f6c46793074f661f2fc186620a5298b1461699ba10f33233324d6e1cca2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCC 5212 bytes
font_02_sfnt_off00008d70.bin
409f5c42fb2f5a63421865c2358ab5d4a73e4ff3bb955bf24c97c5eca3176f68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D70 10824 bytes

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