Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e5d26630c3fef5…

MALICIOUS

PDF

50.0 KB Created: 2020-07-30 09:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f77466e2b3e6093a28789f21a6ef83a0 SHA-1: c42117cb24f1a3e345c8dc29e136bf9b524a599b SHA-256: b2e5d26630c3fef57caeee046efa401ce6a16c301f22cd6f09f3905a0cf0aff0
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains but ultimately redirect to a known malicious redirector (ttraff.cc). This indicates a phishing or scam attempt designed to lead users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=absorption+refrigerator+pdf
    • http://files.david-jennings.net/uploads/1/3/1/4/131454355/lidototatumev.pdf
    • http://files.phsvikettes.com/uploads/1/3/1/4/131453733/bitiwur-ripepikusewowo-linepipimuji-xolemosabala.pdf
    • http://files.theboho.ca/uploads/1/3/0/9/130969438/budagizime_leganaz_xobofipim_vajeragatigedat.pdf
    • http://files.jancancan.com/uploads/1/3/1/4/131406413/sosazidisajawaj-ledosol-vaxodavuv-ziwobedomanefon.pdf
    • http://files.blakkanvas.studio/uploads/1/3/0/7/130740586/9272871.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0850/files/89657027666.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/gudakapuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/9639/1323/files/memaruxoguwijapimo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/kezuzopabapafeje.pdf
    • https://cdn.shopify.com/s/files/1/0435/7170/8065/files/zizazerasadikepizepisabes.pdf
    • https://cdn.shopify.com/s/files/1/0429/0658/3203/files/35116075092.pdf
    • https://cdn.shopify.com/s/files/1/0435/9336/7710/files/96832211430.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/90179440592.pdf
    • https://cdn.shopify.com/s/files/1/0436/9842/1913/files/92976242662.pdf
    • https://cdn.shopify.com/s/files/1/0433/2437/5194/files/66369571742.pdf
    • https://cdn.shopify.com/s/files/1/0432/6073/9752/files/kopex.pdf
    • https://cdn.shopify.com/s/files/1/0428/7820/6111/files/49590509251.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008630.bin
d2533dc91b163abde77453dc2234a035431f758b5e3e573185b261b610220187
pdf-font-stream PDF embedded font (sfnt) at offset 0x8630 5096 bytes
font_01_sfnt_off00009783.bin
01aa598b59b1191de8b37a7ff7e5ee235b1e3899991c9e826fa23d661c2d2c46
pdf-font-stream PDF embedded font (sfnt) at offset 0x9783 10304 bytes