Malicious PDF — malware analysis report

Static analysis result for SHA-256 b043f4a39257cf36…

MALICIOUS

PDF

68.0 KB Created: 2020-08-14 01:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0f13c886a437064ba48b3d53874d570 SHA-1: a7be8b71ba7490aeab871cd5dccf385766b6f1f7 SHA-256: b043f4a39257cf365a000827261705e1fd8dc1549d0c7aae863e382cf256ed4a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=pronoun+antecedent+agreement+worksheet+doc', which is flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious content, likely for phishing or malware distribution.

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.com/pify?keyword=pronoun+antecedent+agreement+worksheet+doc
    • http://files.devinhuntillustration.com/uploads/1/3/1/4/131452977/7212833.pdf
    • http://files.inscience242.com/uploads/1/3/1/1/131164250/8163630.pdf
    • http://files.radiantawakening.net/uploads/1/3/0/8/130873717/5012882.pdf
    • http://files.fengshuidiscovery.com/uploads/1/3/1/3/131398099/1e464246.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9870/files/giluvisesarojiwim.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7728/files/kovudiri.pdf
    • https://cdn.shopify.com/s/files/1/0441/0372/9304/files/pemifitesugepunobagod.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/3379273503.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/representation_theory_of_lie_groups.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/sogenivorivonixu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/filibovumugukil.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5290/files/pexebaveselivezo.pdf
    • https://cdn.shopify.com/s/files/1/0446/8791/7209/files/nurekapovimoxog.pdf
    • https://cdn.shopify.com/s/files/1/0431/0358/4409/files/10622598683.pdf
    • https://cdn.shopify.com/s/files/1/0431/4991/8362/files/fufifedujigefanugulevebod.pdf
    • https://cdn.shopify.com/s/files/1/0434/6799/7344/files/91161514433.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_off0000b904.bin
dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21
pdf-font-stream PDF embedded font (sfnt) at offset 0xB904 2828 bytes
font_01_sfnt_off0000c2fe.bin
4367b7137fad5741d55a2de85cf1fd1a091f58548a410dc1be7394148a77d36f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FE 5480 bytes
font_02_sfnt_off0000d582.bin
21fe624dc1bc0db491bb39898f36337a1fc2cd36983d27bea621edf03805aa48
pdf-font-stream PDF embedded font (sfnt) at offset 0xD582 13560 bytes