Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ba104b15f059e3…

MALICIOUS

PDF

114.5 KB Created: 2020-08-12 22:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b3a010812c632c6d9d51cc2ebe9a22b SHA-1: 00fc74d8e19b64436518902ac6a13164f8535b6a SHA-256: 15ba104b15f059e3a98927a929d563cb335af7104f61a391c74ab2f31e66d176
202 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDFs, with one prominent link pointing to a known malicious redirector. The document body, though obfuscated, contains text related to accounting ledgers and a URL that mirrors the malicious redirector. This suggests a lure to redirect users to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=basic+accounting+ledger+entries+pdf
    • http://files.hus-keevbclub.com/uploads/1/3/2/6/132695213/mevolezebinidot.pdf
    • http://kelorevu.indianamainecoons.com/uploads/1/3/2/7/132740405/7088138.pdf
    • http://files.diamondwbarrelhorses.com/uploads/1/3/1/6/131607075/gedukaxu-voxufawusukaki.pdf
    • http://files.baptistelakecampingandstorage.com/uploads/1/3/1/3/131380875/c2c8d9023.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/manoga.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/53686856422.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/debasuredifijobaturulifev.pdf
    • https://cdn.shopify.com/s/files/1/0436/0749/0717/files/zozobojesove.pdf
    • https://cdn.shopify.com/s/files/1/0433/7795/0881/files/nakud.pdf
    • https://cdn.shopify.com/s/files/1/0428/2744/8476/files/vexatuzajegepinudelel.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3829/files/xilemerodipibopinate.pdf
    • https://cdn.shopify.com/s/files/1/0429/0369/9615/files/makapepovafirosabeliwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4248/0021/files/91333850928.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/chemistry_textbook_online.pdf
    • https://cdn.shopify.com/s/files/1/0451/3444/6746/files/gym_workout_plan_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0447/1390/2234/files/9311975551.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/ropabebogegezufanekika.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000185a0.bin
8d06c30995b38140d495ba1782675095b2e7356576a9b673a72987bca60e9673		 pdf-font-stream PDF embedded font (sfnt) at offset 0x185A0 5372 bytes
font_01_sfnt_off000197e7.bin
ec1316e6ef98762c87ae75a5095b680eebc472f11e6960b9a2514722d000258f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x197E7 10868 bytes

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