Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c4bfec3b9afeb39…

MALICIOUS

PDF

44.2 KB Created: 2020-08-05 08:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e491373f84bfa878e31ed6db38e1274a SHA-1: 081b720ccc99e198ec1e427499556831dfb992c2 SHA-256: 6c4bfec3b9afeb3955b73157d413068f4a8bf006fae9127a2cf01503b21142f7
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'corporate financial risk management pdf' and the malicious URL. The presence of numerous external PDF links suggests an attempt to create a link farm, likely for SEO poisoning or to distribute further 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.com/pify?keyword=corporate+financial+risk+management+pdf
    • http://ziwafo.blissfamilyfurniture.com.au/uploads/1/3/0/8/130874493/ximop.pdf
    • http://files.newsalembaptistky.com/uploads/1/3/2/6/132681698/pigotusu-lewutedibe.pdf
    • http://pilagomi.dbayna.com/uploads/1/3/1/3/131384281/31d1069d18.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/folagasamavetagil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nagexonulelaxefirulilona.pdf
    • https://cdn.shopify.com/s/files/1/0434/7500/9686/files/25402844151.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/vobuvafejepakapevafom.pdf
    • https://cdn.shopify.com/s/files/1/0434/7520/6294/files/99874764198.pdf
    • https://cdn.shopify.com/s/files/1/0437/8286/5058/files/78020300683.pdf
    • https://cdn.shopify.com/s/files/1/0435/0879/3510/files/disujis.pdf
    • https://cdn.shopify.com/s/files/1/0433/8394/7427/files/68498287784.pdf
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/69110606230.pdf
    • https://cdn.shopify.com/s/files/1/0433/9374/5046/files/32433121922.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4274895189.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/vixesuri.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/nefabuwofuwomubixu.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_off00006dc2.bin
7a3ad7eba3c4e520aa48b6a3f3a7e197aff34371d2171def499f532dfca4ad32
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC2 5444 bytes
font_01_sfnt_off0000802d.bin
db6773d115989738018796cb2bdecf6f1d791ad6f35fcee94d3872e9d8f38b3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x802D 10252 bytes