Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc251f406b1f626…

MALICIOUS

PDF

74.4 KB Created: 2020-08-10 22:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03d44109bfe70f5c7a35f0817dcbdc67 SHA-1: 1fa31f5810264040afd8ec0e2f76e244667a8845 SHA-256: ecc251f406b1f626b7450679f19a28b895823ceb99e29a3d3c1b0d86c40dc39b
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. This indicates a phishing or redirection attack. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the analysis of specific behaviors.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=fusionner+deux+pdf+avec+apercu+mac
    • http://files.blackduckmarinecanvas.com/uploads/1/3/0/7/130738836/natewareli.pdf
    • http://files.angelajacksonbrown.com/uploads/1/3/1/4/131454024/kojopo.pdf
    • http://files.adultedresources.com/uploads/1/3/1/0/131070798/ee770.pdf
    • https://cdn.shopify.com/s/files/1/0446/6160/4505/files/chase_dreams_kalin_and_myles.pdf
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/mtga_codes_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0429/1811/7543/files/vefalokepefamoxamijozago.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/pesetenepijixeperav.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/install_redis_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0439/9860/9566/files/81122337690.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/42961932997.pdf
    • https://cdn.shopify.com/s/files/1/0432/7125/8278/files/33930258400.pdf
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/diabetes_insipidus_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0428/2771/0630/files/45643339431.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/safoninobebek.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0021/files/11741157895.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/small_estate_affidavit_florida.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000e983.bin
1874017d897b35e53823d2f2597b881dd2482d4892e0611bf09576fc2194d5a3
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE983 20820 bytes
font_00_sfnt_off0000b06e.bin
df99230f985408dd90663edf9f75ea732b2cda2e71e977a18dee5c84ce0a5785
pdf-font-stream PDF embedded font (sfnt) at offset 0xB06E 5156 bytes
font_01_sfnt_off0000c1df.bin
fc3da9c3b35f265fe7d23fb8c1a050a4fc4d951b673ceb7ae6b18ff0b6b4ad56
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DF 12688 bytes
font_03_sfnt_off00010bfb.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFB 4324 bytes