Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f414c43db3080fc…

MALICIOUS

PDF

39.8 KB Created: 2020-08-04 14:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb9049e49f22dc8def364c3ddc2be540 SHA-1: 7c61ed25ba1b34b9bbd92905995d1c86090197a1 SHA-256: 0f414c43db3080fc413edae037edbb2aa74defef434fcb6352c09ddbcd50f68b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically a redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'parking building floor plan pdf', suggesting a lure. The presence of numerous external links, many pointing to Shopify-hosted PDFs, indicates a broad SEO poisoning or link farm strategy. The ML classifier 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=parking+building+floor+plan+pdf
    • http://files.babaanddada.com/uploads/1/3/2/6/132681823/nonewexezo.pdf
    • http://joxun.allpurposerental.net/uploads/1/3/1/1/131163635/vogusi_vipunedo_xejewemipen.pdf
    • http://files.empoweredlifestyles.net/uploads/1/3/1/0/131070351/7a9760aa.pdf
    • http://files.francolabcu.org/uploads/1/3/1/3/131384279/4fd40018c4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2607/8106/files/26872083639.pdf
    • https://cdn.shopify.com/s/files/1/0431/3186/3202/files/29192668398.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5234/files/53994101159.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/90192437873.pdf
    • https://cdn.shopify.com/s/files/1/0432/0306/8068/files/58033327639.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9380/files/divuwizomelagumabawonulir.pdf
    • https://cdn.shopify.com/s/files/1/0434/5724/9430/files/69188416831.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/zuwek.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/55362201395.pdf
    • https://cdn.shopify.com/s/files/1/0437/9312/1442/files/48257500724.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_off00005f43.bin
cbfa18a0f9af734743c521fa7057ffacda2f6e4ed942c5b779b4da3de5a27401
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F43 5236 bytes
font_01_sfnt_off00007125.bin
b20ee072255bfc3a84d9defcd7d2c2b2f898a54c4e6519b8ef658f0cf0b675c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7125 9852 bytes