Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b857b350b452420…

MALICIOUS

PDF

41.7 KB Created: 2020-08-22 11:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba0f36e5b2b1f31482c1156dab22e4ab SHA-1: c2020a2fde8b4688b6f3061f669ac6d8e226b68f SHA-256: 7b857b350b4524201e57a94e1e0e0e59cbe3c57374c7275eab9b9dc1f5184d70
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to appear as search results, with one prominent link leading to malicious redirector infrastructure. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to drive traffic to potentially harmful sites. No scripts were extracted, but the document's structure and embedded links are indicative of a phishing or traffic-distribution scheme.

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=define+performance+appraisal+in+hrm
    • http://files.bohooils.com/uploads/1/3/1/4/131437924/xofovanulurede-nimoxobuzilefek-xuxuwovi.pdf
    • http://files.vanessamulton.com/uploads/1/3/1/8/131871745/44f680d7d78.pdf
    • http://files.gandaconsultinggroup.com/uploads/1/3/1/6/131637273/nobekimuxugiwu-zezibowilikim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5391/5043/files/google_chrome_32_bit_terbaru.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/ffxiv_hunt_locations.pdf
    • https://cdn.shopify.com/s/files/1/0433/9118/9157/files/3857691539.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/82595467958.pdf
    • https://cdn.shopify.com/s/files/1/0431/2629/2629/files/english_test_pre_intermediate.pdf
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/rojamikiterizilo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6231/files/crosswords_with_friends_answers_4_10_19.pdf
    • https://cdn.shopify.com/s/files/1/0430/9096/8729/files/98962253030.pdf
    • https://cdn.shopify.com/s/files/1/0435/8779/7151/files/35023857075.pdf
    • https://cdn.shopify.com/s/files/1/0438/3123/0624/files/rune_factory_4_fishing_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/8537/9237/files/mojifik.pdf
    • https://cdn.shopify.com/s/files/1/0435/5286/6467/files/nomura.pdf
    • https://cdn.shopify.com/s/files/1/0437/7811/3697/files/tafinegiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/4793/4359/files/ketogenic_diet_grocery_list.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_off000064e5.bin
8842311b71ffc409e1fe301beaf04943ad06ffb55deb7091ab442671abe71ca9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E5 5252 bytes
font_01_sfnt_off00007696.bin
6d994768334ede9eb9ff5487dd9e3988b9805afd853fb3d00b43efc6301f0899		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7696 10428 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.