Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d88f7570e07ebe…

MALICIOUS

PDF

109.0 KB Created: 2020-08-05 06:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0646e9c7af39f7afe4b1339af4a73c47 SHA-1: d186a4a7f4951efe9fd39ee8d79a32de69b30f43 SHA-256: 81d88f7570e07ebef76b3009f31a6cdcd284975b3e612b8b60ba38910a34520a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is presented within the document body, disguised as a CCTV camera proposal. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on 'cdn.shopify.com'. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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.com/pify?keyword=cctv+camera+proposal+pdf
    • http://files.haussonas.com/uploads/1/3/0/7/130775393/8959169.pdf
    • http://files.gthandypro.com/uploads/1/3/2/8/132814050/032c2a366b295.pdf
    • http://files.shieldedhearts.org/uploads/1/3/1/3/131398091/vonaru.pdf
    • http://files.xquisitebalance.com/uploads/1/3/1/3/131383837/5195634.pdf
    • http://files.scvmc1g.org/uploads/1/3/1/4/131483098/817010a107aa50.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/valkyrie_profile_2_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/wonuxexukoveta.pdf
    • https://cdn.shopify.com/s/files/1/0432/4252/0739/files/13199568157.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/novaterakatiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/bevujorenezajemaxixutogu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5058/1662/files/gudemozuxozo.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/32111707797.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/29559336889.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/topinikofavetugizowudal.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7822/files/lajabovafegifimegatazoju.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/mepinodojarapagim.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/jigebefetuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6241/files/luxupovafiwewuvebudexenag.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016172.bin
23b245664a7b0e7a39fd570053f779401ad1fa4717d700ef696c132070c98b49
pdf-font-stream PDF embedded font (sfnt) at offset 0x16172 5020 bytes
font_01_sfnt_off00017288.bin
b4060f8cd915c69d258065520d58de36c6477ab23997429909d5309b1ca4f751
pdf-font-stream PDF embedded font (sfnt) at offset 0x17288 11188 bytes
font_02_sfnt_off00019869.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x19869 4324 bytes