Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e0ac410a334c5c…

MALICIOUS

PDF

45.7 KB Created: 2020-08-23 15:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 126964076c9e2b18e2f4de3029f6a3d1 SHA-1: d8c909d620f34d554caf17620c231d5e0a32e5e3 SHA-256: e2e0ac410a334c5ccc35327193f96387380d11335cc1705a157751f0841203a8
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, with one critical heuristic identifying it as a link farm and another flagging a redirector link to traff.cc. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL and numerous Shopify URLs, suggesting a coordinated effort to distribute content or redirect users. The primary malicious IOC is the redirector URL.

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=anemia+falciforme+anales+de+pediatria
    • http://files.pocketfulproductions.com/uploads/1/3/2/6/132682676/6498671.pdf
    • http://nukusa.elvesterbc.com/uploads/1/3/0/7/130738731/5815519.pdf
    • http://files.moorewrestling.org/uploads/1/3/0/7/130739470/9842873.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/gipufevevebazuneboga.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/navamemaburo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/gavug.pdf
    • https://cdn.shopify.com/s/files/1/0433/2653/7883/files/younow_apk_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/74403215964.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/20974298140.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/honda_gx160_parts.pdf
    • https://cdn.shopify.com/s/files/1/0432/7935/1976/files/74889245210.pdf
    • https://cdn.shopify.com/s/files/1/0430/3663/9395/files/20544953909.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/52261643189.pdf
    • https://cdn.shopify.com/s/files/1/0433/8581/5190/files/63037980893.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4455/files/media_creation_tool_fr_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0435/2439/1067/files/viritipid.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/dark_cloud_2_cheats.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://doi.org/10.29375/01237047.2378
    • 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_off00006a56.bin
1c2023bdcd07a15420c15d91427bd1171d927a26f94439de5ef9fe1b212091a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A56 5288 bytes
font_01_sfnt_off00007c2f.bin
cf2e0ce96b5be3b333f5894df0befcc504cbbd5ad46c79bc710232c979087cec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2F 14124 bytes

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