Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e3088e67d98046…

MALICIOUS

PDF

42.5 KB Created: 2020-08-04 19:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 011851247ff820b59583d37d5510b042 SHA-1: 8447bd98f7b3c0ee14f441adf0574cdffa23807e SHA-256: d3e3088e67d980461d0b206708e3c084568e8a72f8d229ea89853c6fbb9700ec
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Third conditional inversion exercises pdf' and the URL itself, suggesting a lure to trick users into clicking the malicious link. The presence of a large number of external PDF links also indicates a link farm or SEO poisoning attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=third+conditional+inversion+exercises+pdf
    • http://files.frenchreproduction.com/uploads/1/3/0/7/130739826/7f05543.pdf
    • http://files.luckypennyrealty.com/uploads/1/3/0/7/130776567/9317475.pdf
    • http://files.gaindetalks.com/uploads/1/3/0/8/130874629/dojoja-kefuzegomoli-wadab.pdf
    • http://files.primeclassutah.com/uploads/1/3/0/7/130775862/refuxuvulili_duvuzaret_sawavivilagoto_mafewo.pdf
    • https://cdn.shopify.com/s/files/1/0438/8634/6408/files/46770722721.pdf
    • https://cdn.shopify.com/s/files/1/0438/0963/6512/files/fable_2_archaeologist.pdf
    • https://cdn.shopify.com/s/files/1/0428/3629/5836/files/vugatufatini.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/tepevo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0890/0772/files/xunufupe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3458/1911/files/telonotat.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/fetugoponuvibepufitafebe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6558/files/lumawuzotofitefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/59475381556.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60527157158.pdf
    • https://cdn.shopify.com/s/files/1/0430/7356/8919/files/terosaxifatuzenubilobufe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/93672859118.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_off0000681d.bin
c628771ab5e7ee9ca0d152147dde9a498f336a220fe12f2ff0c8bd77a030b1c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x681D 5320 bytes
font_01_sfnt_off00007a37.bin
1887f7883cb5a6a1ed2a32e6d2070265435cb4382abc273fc030b27456bf27fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A37 10128 bytes

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