Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f55a1da8496f95…

MALICIOUS

PDF

38.0 KB Created: 2020-08-23 17:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9e983222faeec6ec3da3ff098958a1f SHA-1: d253dae1536348580927774d50bbfcde4c4591c5 SHA-256: 44f55a1da8496f952a78553d48876b0300638359e49a388ca160dbaee401996b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic, potentially leading to further malicious content or phishing attempts. No scripts were extracted, limiting the ability to determine specific payload delivery mechanisms.

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=acapellas+afro+house
    • http://loliju.boutiqueguitarshowcase.com/uploads/1/3/1/4/131452839/zutebediges-tegitabod.pdf
    • http://midem.danielsuniqueartforms.com/uploads/1/3/1/3/131383791/4431713.pdf
    • http://files.threepointcolor.com/uploads/1/3/0/7/130776493/5445214.pdf
    • http://files.charlestonharbor.org/uploads/1/3/1/4/131438641/pitoxodavujudoxugune.pdf
    • http://monetafi.gobe-everyday.com/uploads/1/3/0/7/130740249/857553f60.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/dovikalewupizosatanidor.pdf
    • https://cdn.shopify.com/s/files/1/0432/6939/0500/files/stk_power_amp.pdf
    • https://cdn.shopify.com/s/files/1/0436/0100/2664/files/tamibedopopek.pdf
    • https://cdn.shopify.com/s/files/1/0439/3782/4926/files/vipibanixezipagumix.pdf
    • https://cdn.shopify.com/s/files/1/0430/6488/5402/files/magicseaweed_newquay_fistral_north_surf_report.pdf
    • https://cdn.shopify.com/s/files/1/0437/5235/8049/files/xitazosudivi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3017/6159/files/71210563874.pdf
    • https://cdn.shopify.com/s/files/1/0431/9988/9571/files/debonexanorano.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044f8.bin
7f43d1c0c286b2df3f1a97a7a66632a04f4d401f80b620c387e3a5630a3c068e
pdf-font-stream PDF embedded font (sfnt) at offset 0x44F8 5092 bytes
font_01_sfnt_off00005639.bin
75354a267f707ba61da80740fe094f1499f377d606167171f500456d4c82ace0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5639 4636 bytes
font_02_sfnt_off0000667e.bin
68de0d070bda884d7a3b8747c9f893381bdd51c99a14f251d813fc7bec9e388b
pdf-font-stream PDF embedded font (sfnt) at offset 0x667E 10272 bytes