Malicious PDF — malware analysis report

Static analysis result for SHA-256 101391e4a1b172e9…

MALICIOUS

PDF

40.9 KB Created: 2020-08-09 01:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 761783cdb3f4aeafcaa2701ae8c88323 SHA-1: e82aa3e699bfbb18ed84f9331f1a3fd36c7cbe33 SHA-256: 101391e4a1b172e9890deec9bde7ce9fe6fef647f590eeebd0a8286d1adde2cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a known malicious redirector, suggesting an attempt to lead users to malicious content. The ML classifier also strongly indicated maliciousness. The document body, though corrupted, contains text related to 'valley of the dolls book pdf' and the malicious URL, reinforcing the lure.

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.ru/pify?keyword=valley+of+the+dolls+book+pdf
    • http://gulewakil.cakencrumbs.co.uk/uploads/1/3/0/8/130874493/ronok_rukovisisubigod_donesisu.pdf
    • http://files.magiqatlas.com/uploads/1/3/0/8/130814513/zivatemurijupizowigi.pdf
    • http://vekag.intuitiveaim.com/uploads/1/3/1/6/131636725/womivoselal-tufixibefosip-xolorivatozenaz-levad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8280/9497/files/wubozobupopirirovukeve.pdf
    • https://cdn.shopify.com/s/files/1/0434/1979/5623/files/arthropoda_classes.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/79887234476.pdf
    • https://cdn.shopify.com/s/files/1/0428/9950/5311/files/52653138640.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/91199759767.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/gw2_firebrand_wvw_build.pdf
    • https://cdn.shopify.com/s/files/1/0437/9007/4005/files/google_plus_profile_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/fasuxirusakiva.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/52271497003.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/8297393561.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3212/files/41686504043.pdf
    • https://cdn.shopify.com/s/files/1/0431/5165/5061/files/agnus_dei_free_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/3175/5932/files/94877625566.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_off000062d5.bin
b381df58599fd579ddff935decfbfba7327998d69bb89b9927343bbbb569a320
pdf-font-stream PDF embedded font (sfnt) at offset 0x62D5 5304 bytes
font_01_sfnt_off000074e8.bin
10539bb98754b66c88ace9a6aa04156e4e166e555b0c8b4aeb2c4ed319a12468
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E8 9948 bytes