Malicious PDF — malware analysis report

Static analysis result for SHA-256 00665bd3390ea4ce…

MALICIOUS

PDF

44.2 KB Created: 2020-08-25 22:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0b45c74eabde0e1717178f7adc25294 SHA-1: 0caf700ccec5b14ccf89d6842dffb2918e9e60cc SHA-256: 00665bd3390ea4ce8de1070ab92a0be20203dd9a1de0f72e6d67776bffcf3ffb
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm behavior, with numerous links to external PDFs, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which is likely used to funnel victims to a malicious site.

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.com/pify?keyword=en+iyi+doktor+kim+b%25C3%25B6l%25C3%25BCm
    • http://pavuwiwi.mskl313.com/uploads/1/3/0/7/130776457/8689450.pdf
    • http://wodosu.mthopebaptist.org/uploads/1/3/1/3/131384714/tizuno.pdf
    • http://files.iamphoto.co.uk/uploads/1/3/0/9/130969241/gorenorowi.pdf
    • http://kiwixef.russellwedwards.com/uploads/1/3/1/4/131408022/9ee2ec13b.pdf
    • http://files.franklinvolleyball.org/uploads/1/3/0/8/130815277/8813793.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/70832476434.pdf
    • https://cdn.shopify.com/s/files/1/0430/8202/3061/files/poturuwuda.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/76218129521.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58085676994.pdf
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/gususizevepilamebu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2926/5574/files/application_for_australian_citizenship_form_119.pdf
    • https://cdn.shopify.com/s/files/1/0431/7514/9719/files/family_assessment_tools_family_medicine.pdf
    • https://cdn.shopify.com/s/files/1/0437/9269/5456/files/atacand_hct_bula.pdf
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/bending_moment_calculation_for_uniformly_distributed_load.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/41754772356.pdf
    • https://cdn.shopify.com/s/files/1/0435/8320/9631/files/takobovorimamajorakoxofev.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/kalujisotodakitojig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/909040323.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6092/files/greg_everett_olympic_weightlifting.pdf
    • https://cdn.shopify.com/s/files/1/0438/7710/5832/files/58693668016.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006090.bin
c5b6385736355184f6dd143c18ed298c8c6e588451010b8dd4c0456758b74c72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6090 3092 bytes
font_01_sfnt_off00006bb4.bin
3010046e076ecd204b33bc8bb17ed9c4653f41008edc635eb3bca57d1590612a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB4 5104 bytes
font_02_sfnt_off00007c8c.bin
93d0ed1f5745e736bf0ea415cf9edceff7b9ff620fbf9c95aa45fbaec61bfc5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8C 11708 bytes

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