Malicious PDF — malware analysis report

Static analysis result for SHA-256 9593e4008cd917d2…

MALICIOUS

PDF

37.5 KB Created: 2020-08-03 18:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 377528df37a46cc9948d91333d01d59a SHA-1: ddfc7b0e008992305803ba508c8ad897a5569295 SHA-256: 9593e4008cd917d2449f8f8977e1bf281b9739dae27003d46257eb1f4c69a985
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. Crucially, one of these links redirects through 'ttraff.cc', which is known malicious infrastructure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be directing users to malicious or potentially malicious content via a link farm.

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=ambitious+baba+insurance+pdf
    • http://vokabolez.askdogood.com/uploads/1/3/1/4/131406840/kinajonak_saposibizawov.pdf
    • http://files.roejendradesigns.com/uploads/1/3/1/3/131380845/120d71d4bb.pdf
    • http://files.andicho.com/uploads/1/3/1/4/131438202/zateweleg.pdf
    • http://files.deliciousdelivered.net/uploads/1/3/0/7/130738785/8089a20f8.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90209356055.pdf
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/rodogadare.pdf
    • https://cdn.shopify.com/s/files/1/0439/5696/1438/files/wizedadedazug.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7967/files/nisonag.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4097/files/zujisugonutetanowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/87269895879.pdf
    • https://cdn.shopify.com/s/files/1/0440/4117/5190/files/72228375280.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/33603007937.pdf
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/zikuvesukelime.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/10911506315.pdf
    • https://cdn.shopify.com/s/files/1/0436/2400/5794/files/miduxafezurog.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_off00004705.bin
19d6c3d72b345595c846dcff764ee085ca045375b3f881152d094857470c4dd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x4705 5280 bytes
font_01_sfnt_off000058d4.bin
98cf3b4c5c7b428dc51c68b20572f639deb1f7aea05e013fe87b922d944a11eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x58D4 10032 bytes
font_02_sfnt_off00007ae9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE9 4324 bytes