Malicious PDF — malware analysis report

Static analysis result for SHA-256 6604e4737e7d9d60…

MALICIOUS

PDF

38.4 KB Created: 2020-07-26 10:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0ef6d930449e5fa1c5d259560c31b93 SHA-1: 4226187aa0afc4e08f987fbb1dd8620b522e3191 SHA-256: 6604e4737e7d9d6094b8f564c2f15566ea6aa69a3d5c7322ddcb04a98d1dc769
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains text related to 'wedding whatsapp status video', suggesting a lure. The presence of embedded URLs and the ML detection point towards a phishing or spam campaign.

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=wedding+whatsapp+status+video++in+tamil
    • http://files.wisepathbirthing.com/uploads/1/3/1/3/131383045/korerugujajaf_femizajudurevap_xetikabupupuje_dofezirez.pdf
    • http://files.mindfuljourney4health.com/uploads/1/3/2/7/132740288/de55ee3f97ea.pdf
    • http://files.southdevonplayers.com/uploads/1/3/2/7/132740845/5545948.pdf
    • http://files.5049coastalcommunity.com/uploads/1/3/1/6/131636946/3176297.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0761/4882/files/55210815248.pdf
    • https://cdn.shopify.com/s/files/1/0431/5280/1943/files/newesofexunazoz.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/kabubifagepanumezaxeva.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3163/files/xupesonerojoxudurozuzif.pdf
    • https://cdn.shopify.com/s/files/1/0434/9257/3334/files/5425008899.pdf
    • https://cdn.shopify.com/s/files/1/0431/3523/8301/files/50090942006.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/zetobivokow.pdf
    • https://cdn.shopify.com/s/files/1/0438/4430/5061/files/52313970304.pdf
    • https://cdn.shopify.com/s/files/1/0429/8801/1673/files/dogazapejegegem.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6719/files/221674641.pdf
    • https://cdn.shopify.com/s/files/1/0430/1189/9545/files/61830870882.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/33455954351.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_off000059a3.bin
771bf51ea7631f3f71b3ccd7d2a62a72f1faf137f4fa5efd334969f8537c1629
pdf-font-stream PDF embedded font (sfnt) at offset 0x59A3 5324 bytes
font_01_sfnt_off00006baf.bin
25c7ff3bae15b48d906d259395af439badbf1e3e017aa5f686882c8148ec152e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAF 9388 bytes