Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec4acfd027e702b…

MALICIOUS

PDF

44.0 KB Created: 2020-08-26 17:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e26df9595d5c8a66775fd8e0ab05b422 SHA-1: 85afc006bd3eb415f5b7f371c4f50ef84224b265 SHA-256: cec4acfd027e702b1b4e05fa58b07d77bb209ce17613e4c29f0c4d57a3d63368
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic firing indicates that the document links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=fallout+4+can+provisioners+die'. This suggests the document is designed to redirect users to malicious content through a link farm. The ML classifier also strongly flagged this PDF as malicious.

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=fallout+4+can+provisioners+die
    • http://kakewos.beyoutifulphoto.com/uploads/1/3/0/7/130776611/nuluxogomegijuk.pdf
    • http://naluwok.camillefrancois.com/uploads/1/3/0/8/130874019/vovaweg.pdf
    • http://sabux.northcoasttactical.com/uploads/1/3/1/4/131437709/3a372d2e44ba.pdf
    • http://files.chiminisiberians.com/uploads/1/3/0/9/130968956/wawuzawibuweru_bopulus.pdf
    • http://fiwon.sopoochtraining.com/uploads/1/3/0/7/130739836/tuwakela-lawoka-mupofavawara-jekavelusaxe.pdf
    • https://cdn.shopify.com/s/files/1/0438/5269/3654/files/64593147554.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7472/files/pijujexexotopuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/5672/6170/files/tamiweresaduzeme.pdf
    • https://cdn.shopify.com/s/files/1/0434/2421/9293/files/kafasarotu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2286/7880/files/fivizana.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9959/files/spss_survival_manual.pdf
    • https://cdn.shopify.com/s/files/1/0464/5198/2504/files/81489618654.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1703/files/12007488412.pdf
    • https://cdn.shopify.com/s/files/1/0431/9700/5981/files/treino_calistenia_iniciante.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/bubenup.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_off00006efa.bin
11cc3bded50b4526e6afd9d0d98a7fed96a0376e7af15b73c596de9af771a11a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFA 5168 bytes
font_01_sfnt_off000080a6.bin
504769723dbd478035faebe06a328224f0b623c1e1e0e9b207d89462eb0e6651
pdf-font-stream PDF embedded font (sfnt) at offset 0x80A6 9980 bytes