Malicious PDF — malware analysis report

Static analysis result for SHA-256 1104a7fad8956c39…

MALICIOUS

PDF

44.6 KB Created: 2020-08-09 04:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cef1f36a5d38d365cc307c78b932dce7 SHA-1: ffb8d9b626e7b784e63c2c5ce21b127b57d38234 SHA-256: 1104a7fad8956c392e9f571706f83871d0fcd52e9f613fc80e005597ca14b160
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at `ttraff.com`. This suggests the document is designed to lead users to malicious websites, likely for phishing or to download further malware. The ML classifier also strongly indicated maliciousness.

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=die+blechtrommel+pdf+download
    • http://files.dogwaydogrescue.org/uploads/1/3/1/4/131452861/1960213.pdf
    • http://files.burninroseranch.com/uploads/1/3/1/3/131379590/eccfae3.pdf
    • http://files.toymigos.com/uploads/1/3/1/8/131856381/61b8c1a.pdf
    • http://files.trseniors.org/uploads/1/3/0/7/130775387/jewovolepesodi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9649/0655/files/skf_needle_roller_bearing.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/tewomugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9199/files/46912740803.pdf
    • https://cdn.shopify.com/s/files/1/0430/5394/0887/files/deridusufotafegopil.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0817/files/30091959568.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/41064881247.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/xedewuginetokafavanem.pdf
    • https://cdn.shopify.com/s/files/1/0440/6339/1894/files/bms_season_1_episode_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/5472/6310/files/peniwalivejesebewij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f91.bin
54837bc31053b4a28e078cc91c6b04f87268d4e0c5f59d6e2c732f34e71e2fc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F91 5236 bytes
font_01_sfnt_off0000713a.bin
68abc26edadbd9fbb7055d1e9083a80316f2598c703df69ff003d8b42afee2ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x713A 11176 bytes
font_02_sfnt_off000095c1.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x95C1 4324 bytes