Malicious PDF — malware analysis report

Static analysis result for SHA-256 380f70d3d2f65862…

MALICIOUS

PDF

55.9 KB Created: 2020-08-18 19:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bbc405807222f06e1ecfaf133412c2d SHA-1: 2e858482d552368cd8df22193624446c8102c83b SHA-256: 380f70d3d2f658623ce50c1e3d6a92caa7ab0e4a6aa692aabf2900a1ef58f098
152 Risk Score

Malware Insights

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

The PDF contains numerous external links, including a critical redirector link to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same text as the malicious URL's keyword parameter, suggesting a lure for users searching for academic papers. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be tricking the user into clicking the malicious link.

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=advanced+technologies+for+intelligent+transportation+systems+pdf
    • http://files.accoladesupport.com/uploads/1/3/1/8/131872054/aed496eb.pdf
    • http://files.jkandtheloss.com/uploads/1/3/1/3/131398066/taminudunuxowusoxeki.pdf
    • http://files.robplath.com/uploads/1/3/1/4/131483097/tomefidatifon_sulavex.pdf
    • http://files.carpetcleanoahu.com/uploads/1/3/1/3/131383602/zefot_tujopopafodaja_kojubutujara_xapesiwuka.pdf
    • https://cdn.shopify.com/s/files/1/0433/3830/1594/files/motel.pdf
    • https://cdn.shopify.com/s/files/1/0433/4390/4927/files/solid_geometric_figures.pdf
    • https://cdn.shopify.com/s/files/1/0434/5636/4711/files/vasufob.pdf
    • https://cdn.shopify.com/s/files/1/0436/0713/0270/files/as_per_request.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/44285015945.pdf
    • https://cdn.shopify.com/s/files/1/0428/9118/2243/files/66089999249.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/kexanonipeje.pdf
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/70501150229.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nomevorijodasulalo.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_off00009bc3.bin
195c4d8243efad690d55940eb49ee628fce7f28941b8940a0c4d39f7573761cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BC3 5720 bytes
font_01_sfnt_off0000af1a.bin
c8d0f326041568b25523af0360d46eb1b310a1fa476c196f92725720810149c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF1A 10176 bytes