Malicious PDF — malware analysis report

Static analysis result for SHA-256 c03d87a22136b28a…

MALICIOUS

PDF

47.7 KB Created: 2020-08-12 01:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 650a62d59ebf2535db7833b123c45827 SHA-1: 93c6a35e4fd68208e0318a14c40747c554947679 SHA-256: c03d87a22136b28aa9ac6e8bfb18f1e49cf93f93b4d615321bf41a5d39592129
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a download for a style guide. This link points to 'https://ttraff.cc/pify?keyword=associated+press+style+guide+pdf', which is a known malicious redirector. The document also contains a mass external PDF link farm, with many links pointing to shopify.com, likely to improve SEO for malicious content. No scripts were extracted from this sample, but the presence of the malicious redirector and the link farm strongly suggest a phishing or social engineering attack aimed at delivering further malware.

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.
  • 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
  • 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=associated+press+style+guide+pdf
    • http://files.propertyservrichmond.com/uploads/1/3/0/7/130775974/jutuvewiz.pdf
    • http://files.brucereevesswiftamericasartist.com/uploads/1/3/1/4/131455636/fofogumeponemup.pdf
    • http://files.darkpoetry9.com/uploads/1/3/1/6/131606000/mimimujirus.pdf
    • http://wexodunax.rendlemancompany.com/uploads/1/3/1/4/131453329/1211993.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/57726355247.pdf
    • https://cdn.shopify.com/s/files/1/0437/5075/2417/files/active_listening_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/52318044040.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dofupuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9200/8357/files/zuzejuxefirujomifawem.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/29452586007.pdf
    • https://cdn.shopify.com/s/files/1/0428/5077/9295/files/mejanijadepeniresonota.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2411/files/galuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/gate_2020_eligibility_document.pdf
    • https://cdn.shopify.com/s/files/1/0432/4209/4756/files/duwelaratajojigumon.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/lepesivexoriwumemebeda.pdf
    • https://cdn.shopify.com/s/files/1/0432/6365/6099/files/62481308112.pdf
    • https://cdn.shopify.com/s/files/1/0431/4143/1464/files/rewuzoxu.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_off00007c05.bin
36042bd7bd41fc19ddf9ee10c0ac5e0140a0f0d1dbfe87519aa78bcf27e68edb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C05 5416 bytes
font_01_sfnt_off00008e87.bin
1780ddc21c1de7577943512f04a459e8ecb4345257b5215c40221c70604486ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E87 10428 bytes