Malicious PDF — malware analysis report

Static analysis result for SHA-256 01240e6229ad08cd…

MALICIOUS

PDF

97.8 KB Created: 2020-08-17 15:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f347333e29a817880898efb2a3a3b03 SHA-1: 34be3d3217cbefaa211c1379f03aa5dcd8517092 SHA-256: 01240e6229ad08cd9ab9a74c2fdec562726c33bc3641f76640312baf762a46b7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, with a critical heuristic firing indicating a malicious redirector link. The ML classifier also flagged the PDF with high confidence. The primary malicious URL identified is a redirector that appears to be part of a link farm, likely intended to lure users to malicious content.

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=glossary+of+social+science+research+terms+pdf
    • http://files.bigbitedumpsterrentals.com/uploads/1/3/1/4/131406600/8c645d2.pdf
    • http://files.codexpansion.com/uploads/1/3/0/7/130739910/209776.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/9124/4696/files/42310846593.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/osrs_jad_inventory.pdf
    • https://cdn.shopify.com/s/files/1/0428/2236/9446/files/lilozex.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/11887809034.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/cissp_for_dummies_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/pubov.pdf
    • https://cdn.shopify.com/s/files/1/0434/3637/6231/files/10672685819.pdf
    • https://cdn.shopify.com/s/files/1/0430/9434/3829/files/suwuxolerufobogoxekitep.pdf
    • https://cdn.shopify.com/s/files/1/0429/8647/1587/files/nisuba.pdf
    • https://cdn.shopify.com/s/files/1/0435/6279/5171/files/perbedaan_emfisema_dan_bronkitis_kronis.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/bakupagumo.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_off000139c0.bin
fdafa3052b8d4045924321e81ac4154d5163dda1bd1e469d652261878abbf022
pdf-font-stream PDF embedded font (sfnt) at offset 0x139C0 5528 bytes
font_01_sfnt_off00014c65.bin
4a61e93935b5842a50cdde9d60728ad1ac597081d064f4b7f092bbe282af6c43
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C65 14736 bytes