Malicious PDF — malware analysis report

Static analysis result for SHA-256 061cd98f24ae1610…

MALICIOUS

PDF

42.0 KB Created: 2020-08-31 11:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa6b2d9a4216da60277cac25ea716e0c SHA-1: b62f0c8d8376ce901c8dd7f7b5e46daa3af04118 SHA-256: 061cd98f24ae16103cf9f2bfe2bc1002570a98c9d24deb1dec49fa41cdbec517
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. It also exhibits characteristics of a link farm, embedding a large number of external URLs, many of which point to Shopify. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. The primary attack pattern involves luring users to malicious sites via embedded links.

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/wix?keyword=pathology+made+ridiculously+simple+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/sheet_metal_guillotine_for_sale_australia.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0714/files/bihar_tet_form.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/gajaduvemugupiron.pdf
    • https://cdn.shopify.com/s/files/1/0461/7076/7512/files/shabadimath_gadag_kannada_calendar_2019.pdf
    • https://cdn.shopify.com/s/files/1/0434/8264/4642/files/how_to_write_a_cinquain_poem_template.pdf
    • https://static.usrfiles.com/ugd/0c41e7_df0e55ef1d3a4905b13a8e46d32db6cf.pdf
    • https://static.usrfiles.com/ugd/7ff653_dcbfccf44c044a22b0481822d9483c08.pdf
    • https://static.usrfiles.com/ugd/b8c837_889d4b88bee9423abddabc7b51e033ab.pdf
    • https://static.usrfiles.com/ugd/384ea4_9341561ece8a4662b98ea9e15209c0ce.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/xobobekezemawijoxuludo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/human_body_parts_chart.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/pune_to_goa_road_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/0464/8859/files/domazimixududapubureji.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4277/files/vajizerap.pdf
    • https://cdn.shopify.com/s/files/1/0430/4912/3993/files/41704020098.pdf
    • https://cdn.shopify.com/s/files/1/0440/4481/2438/files/92622114766.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/cadet_college_hasan_abdal_admission_form_2020.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006430.bin
7bb2ba03bdfb7e6045a6199f6ac40d5b6cabc58f90f0a0e95a7a2f083dce37cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6430 5672 bytes
font_01_sfnt_off00007763.bin
aae041c5a136771b46595a5bd30300bf008aca8560e2e561d84ae552286c8904		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7763 10400 bytes

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