Malicious PDF — malware analysis report

Static analysis result for SHA-256 8304cc9c554e97c3…

MALICIOUS

PDF

51.9 KB Created: 2020-08-22 16:39:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6180a3276b23c34147ebc56f6a3d7ad3 SHA-1: f2e4ed7fb69fc443f8996fc68715351c03db2253 SHA-256: 8304cc9c554e97c3db8bcb279ddaab3def95364b72a8a24d0e61b67ff3f8c9b8
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traff.com, disguised with a keyword suggesting a school admission form. The document body, though partially corrupted, contains the same lure text and the redirector URL. The PDF also exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains hosting other PDFs.

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=school+admission+form+format+in+word
    • http://files.thecryingblondegirl.com/uploads/1/3/0/9/130969505/956c8.pdf
    • http://files.ripplingheartsstudio.com/uploads/1/3/1/3/131383398/xavabinuroji.pdf
    • http://files.kamariawilliams.com/uploads/1/3/1/4/131453109/sejajuzatuwef_seguxawex.pdf
    • http://tuvagakif.irismeade.com/uploads/1/3/1/4/131407945/9289048.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/rejukalifujosukorivele.pdf
    • https://cdn.shopify.com/s/files/1/0452/2960/5024/files/berlitz_test_level_4.pdf
    • https://cdn.shopify.com/s/files/1/0447/2533/8265/files/all_formulas_of_maths_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93016620893.pdf
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/rudoj.pdf
    • https://cdn.shopify.com/s/files/1/0440/7217/3733/files/13008632824.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/werojogerepus.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/pixeke.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/tiduzeresavuwuzedi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/bakekiwa.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_off000081ed.bin
e00ca2bbf924648f695d4f9f20c86caa70f8bddf3c22d0c209cb6bd4e7b6580b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81ED 5124 bytes
font_01_sfnt_off00009328.bin
6de1f109ff19da15e6b7cb7f7d362fe111f4ce3056164e4c8795cc2530cd8003		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9328 9852 bytes
font_02_sfnt_off0000b4d4.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D4 4324 bytes

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