Malicious PDF — malware analysis report

Static analysis result for SHA-256 f81cbc742124c028…

MALICIOUS

PDF

44.0 KB Created: 2020-07-30 16:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1b65cbb5c6e25483dd0526df0ecef1b SHA-1: 7053909d399741468633c208c7400943357491ff SHA-256: f81cbc742124c0288cd5d69d60d4b0bb897f3a704c6247387787ec9e03d1f471
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 domains associated with link farms and redirectors. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, appears to be a lure related to 'Kerosene poisoning management'. The combination of these factors strongly suggests a phishing or redirection campaign.

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=kerosene+poisoning+management+pdf
    • http://files.ccfarmadk.com/uploads/1/3/0/9/130969818/banewamakebuj.pdf
    • http://files.accuratecmmservices.com/uploads/1/3/0/7/130739470/balowazimo.pdf
    • http://files.flagstaffsings.com/uploads/1/3/0/7/130776578/8ea2bc5b96.pdf
    • http://files.senecaflowers.com/uploads/1/3/1/6/131637316/donudubixap-vesopasali.pdf
    • http://files.flagstaffsings.com/uploa
    • https://cdn.shopify.com/s/files/1/0431/1885/4306/files/59979594539.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/29519142275.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/86828677104.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/vaxevuwupewoxujugofevixof.pdf
    • https://cdn.shopify.com/s/files/1/0429/6677/8009/files/58982595335.pdf
    • https://cdn.shopify.com/s/files/1/0433/3207/5678/files/zumazazebexegideza.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/tupabijifesizob.pdf
    • https://cdn.shopify.com/s/files/1/0438/8293/8520/files/metotemadojojudil.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/baniberovonawizusogudil.pdf
    • https://cdn.shopify.com/s/files/1/0437/5298/0641/files/gefexipixune.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/kopojirinonanapirezal.pdf
    • https://cdn.shopify.com/s/files/1/0434/4102/9276/files/73451376018.pdf
    • https://cdn.shopify.com/s/files/1/0427/9602/3975/files/poteju.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_off00006ed0.bin
877936a04571d2b8ada323a6a641031da4ae656762a1c2438aa220a919335b0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED0 5088 bytes
font_01_sfnt_off00008006.bin
33fb59e4fd0e45e02496e4f2abeec6ec4035c83bc18ec2254f4013ac3782b41e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8006 10260 bytes

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