Malicious PDF — malware analysis report

Static analysis result for SHA-256 14bc887e7b4a0ab1…

MALICIOUS

PDF

42.6 KB Created: 2020-08-03 07:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c32334e0360d3bc2e405b73c7325ea3 SHA-1: 0e5ce6357d6a6cf2f158d56ba91b30840126ddad SHA-256: 14bc887e7b4a0ab18de1528ab59259b06f1731307fcaf4bd959a3f2359ef30f4
162 Risk Score

Malware Insights

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

This PDF document contains a link farm and a redirector to malicious infrastructure, disguised as a nutrition guide. The ML classifier strongly indicated maliciousness, and the embedded URL `https://ttraff.ru/pify?keyword=insanity+max+30+nutrition+guide+pdf` is a known malicious redirector. The document likely serves as a lure to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=insanity+max+30+nutrition+guide+pdf
    • http://files.flagstaffsings.org/uploads/1/3/1/4/131453250/0ca79e4ac82e19c.pdf
    • http://files.shopthenoun.com/uploads/1/3/1/3/131381910/cbfb3.pdf
    • http://files.nicoleangelique.com/uploads/1/3/0/9/130969818/bb5686.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/16427359449.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/17940804733.pdf
    • https://cdn.shopify.com/s/files/1/0431/3071/6314/files/watch_spatacus_online.pdf
    • https://cdn.shopify.com/s/files/1/0435/6866/0643/files/bujixipag.pdf
    • https://cdn.shopify.com/s/files/1/0439/1839/3499/files/lekule.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/alias_in_sql.pdf
    • https://cdn.shopify.com/s/files/1/0438/2726/5693/files/gebenevojimu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/peropa.pdf
    • https://cdn.shopify.com/s/files/1/0438/2749/5069/files/60458133625.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/9042630640.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/11171520424.pdf
    • https://cdn.shopify.com/s/files/1/0437/5710/9402/files/89855598201.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_off00006668.bin
ab708edf1ed6afed2de4de854f4c70b0b660b53aacfe59bc3b27ac606a871d1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6668 5744 bytes
font_01_sfnt_off000079ea.bin
26a783b3ea5273c91be4cf0ee148be8bcbab5b7c82777c11b120465f49ad1594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79EA 10404 bytes

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