Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ead5ce0922ac626…

MALICIOUS

PDF

34.4 KB Created: 2020-08-14 20:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82cd85279b59a037d927c18e7250fe46 SHA-1: 549bf6d61e8d2c89c2e5e66f8b76b32da9631a22 SHA-256: 6ead5ce0922ac626307e6b3554fa642ef3630113864a058c12100f9f643e7450
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for a specific PDF document, likely to trick users into clicking the malicious link. The presence of a malicious redirector and a large number of external links suggests an attempt to drive traffic to malicious sites, potentially for further exploitation or phishing.

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/wb?keyword=gimson
    • http://besazone.quartzvanitydirect.com/uploads/1/3/1/4/131406950/6eb6204.pdf
    • http://files.fabiansmagic.com/uploads/1/3/1/3/131384359/wasoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5529/8213/files/verujusup.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/gitigulijalakalufom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/kivekegekagupo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2508/7138/files/17275103984.pdf
    • https://cdn.shopify.com/s/files/1/0432/9226/2560/files/possessive_pronouns_vs_adjectives_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0438/2438/2109/files/98426012106.pdf
    • https://cdn.shopify.com/s/files/1/0437/4586/9985/files/tusuvutab.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/bigod.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1965/files/crack_2_chaniz.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_off00004b3a.bin
ab051960bb360377bd8efbd17070c31c794a27ee1b68178fd8ed50727dceb5b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B3A 5636 bytes
font_01_sfnt_off00005e3d.bin
daf9b2201ac1140fa801fc0e6c52fc85583c577e6f091ed07a280decb99067d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3D 8924 bytes