Malicious PDF — malware analysis report

Static analysis result for SHA-256 704fa695234f4d2b…

MALICIOUS

PDF

38.5 KB Created: 2020-08-17 11:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0471294f2deef5a717e393c35e2895a2 SHA-1: 80112205438a4966d5b84dd35fa22be8e11de13e SHA-256: 704fa695234f4d2b7efecdff55beedb8f8abbd3ae7e60fdb64548f75b26c4b7f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier and heuristic firings strongly indicate malicious intent, likely related to SEO link farming or distributing further malicious content. No scripts were extracted, but the presence of embedded URLs and the PDF structure itself are sufficient indicators of malicious activity.

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=collins+english+for+business+writing+pdf
    • http://files.petpassions.net/uploads/1/3/1/4/131453007/4417121.pdf
    • http://files.popculturecentral.com/uploads/1/3/2/8/132814933/dc2c65c90d630f.pdf
    • http://jubumaje.academiescollaborative.com/uploads/1/3/1/1/131164273/liditemobunof.pdf
    • http://fipuk.springvilleumc.org/uploads/1/3/2/6/132680813/1a8ad95.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2457/9751/files/matricom_controller_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9581/0455/files/aladdin_game_for_laptop.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/36610613974.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/nalanewenalojadakawetefe.pdf
    • https://cdn.shopify.com/s/files/1/0438/7792/5019/files/vobuzixagelux.pdf
    • https://cdn.shopify.com/s/files/1/0438/1055/4016/files/kijesizavowuwap.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/cracker_barrel_menu_lunch.pdf
    • https://cdn.shopify.com/s/files/1/0432/8669/1998/files/75555817733.pdf
    • https://cdn.shopify.com/s/files/1/0431/2062/3765/files/catholic_encyclopedia_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/1358/5566/files/rejetuzejanuguf.pdf
    • https://cdn.shopify.com/s/files/1/0437/2194/9335/files/36109986906.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_off00005066.bin
39263b9bba673cb20a9b381ccbb50a929e3883f0571bf492d9a8939ba99ccb39
pdf-font-stream PDF embedded font (sfnt) at offset 0x5066 5228 bytes
font_01_sfnt_off00006230.bin
37e632f8b835147e235697ad3aa98466f5eea8dc0102d908150aafc0294bf97f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6230 14732 bytes