Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f43b133b7c82c9…

MALICIOUS

PDF

41.9 KB Created: 2020-08-25 18:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69c917c0554e794a2d9e1828ed18e4e3 SHA-1: 2a83ee19ae266672a9a5589e8fb765764b68e40c SHA-256: 07f43b133b7c82c9e3c341e6f170b49e63ebbead54fa6ce89ba56cecbeb7b95d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector service, which is a common tactic for phishing and scam campaigns. The document body, though heavily obfuscated, contains text that appears to be a product name and links to various PDF files, suggesting a lure to disguise malicious intent. The presence of a link farm and a malicious redirector strongly indicates a phishing or scam attempt.

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/pify?keyword=black+and+decker+air+fryer+hf110sbd
    • http://files.picountyfair.net/uploads/1/3/1/4/131408204/tijuger_rorarevobuki_ruvivutawutut_jowukaguvixubu.pdf
    • http://files.barbaraholub.com/uploads/1/3/0/7/130739404/modivedevugen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5911/7206/files/modified_semi_block_letter_format_example.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/debusulajukaxukurunixozab.pdf
    • https://cdn.shopify.com/s/files/1/0433/8951/7978/files/belkin_n750_router_manager.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/bulis.pdf
    • https://cdn.shopify.com/s/files/1/0433/2594/8072/files/2018_chevy_equinox_premier_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2106/files/67511107208.pdf
    • https://cdn.shopify.com/s/files/1/0435/5915/7921/files/28533468319.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20659662050.pdf
    • https://cdn.shopify.com/s/files/1/0429/4279/1839/files/adamantite_scrap_sekiro.pdf
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/minecraft_skins_template_pocket_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/28712625338.pdf
    • https://cdn.shopify.com/s/files/1/0432/8846/1478/files/accounting_in_tally.pdf
    • https://cdn.shopify.com/s/files/1/0429/6504/1308/files/17442514972.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/28487801761.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_off00006390.bin
a3e1ce5150ec595b84a65785718c4933aaaf7da7136c41524eaf2d3eedc4617a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6390 5656 bytes
font_01_sfnt_off000076cb.bin
329c2842ff1090dc0b89446b729fc49b95ba38cc8e9af340dd5dd14e8705592e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76CB 10504 bytes

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