Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0855a1c74d006f5…

MALICIOUS

PDF

54.5 KB Created: 2020-08-05 12:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98d70b3fe21e465c805418a518c3f77a SHA-1: 8a7b28332fb7b03f1374cf4134e687fb58cb538d SHA-256: a0855a1c74d006f5314c2cc69560d5e65bf11f5be48e0a643c8735421189f6e9
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a vocabulary download, which is a common social engineering tactic. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the primary URL. The PDF also hosts a large number of external links, many pointing to Shopify, likely as part of a link farm to improve SEO for malicious content. No scripts were extracted, but the embedded link structure strongly suggests a phishing or malware delivery attempt.

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=test+your+business+vocabulary+in+use+advanced+pdf+download
    • http://ligixefog.cliftonvale.com/uploads/1/3/1/0/131070581/fegalulejid.pdf
    • http://files.amberpipskycounselling.com/uploads/1/3/1/4/131437778/123ae8de4.pdf
    • http://files.happybabylaser.com/uploads/1/3/0/7/130740049/magijam-palidafazise-kosijebijuku.pdf
    • http://files.globalphonetools.co.uk/uploads/1/3/2/8/132814476/buxunajoxut-samibelilapu-dozan-pibobebatok.pdf
    • http://files.investment-studio.com/uploads/1/3/0/7/130739982/tivitaluzem.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/sf-_15_form.pdf
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/26681159469.pdf
    • https://cdn.shopify.com/s/files/1/0450/5042/9598/files/manual_de_gramatica_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/95149201979.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/zexokofujepatajox.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/43886506346.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8487/files/rules_of_aquisition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zekimopesafirizaxos.pdf
    • https://cdn.shopify.com/s/files/1/0428/2915/2423/files/josebevafotunaxipage.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5128/files/wufexurasopumubud.pdf
    • https://cdn.shopify.com/s/files/1/0437/8243/9063/files/sega_saturn_action_replay.pdf
    • https://cdn.shopify.com/s/files/1/0435/5820/7643/files/burn_iso_to_usb_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/jewuzulogikiwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gobobuxewinunegurugita.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/va_nearest_living_relative_form.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_off00008861.bin
9be9b4b2629dec5262305d4573ee71d45e09f0e770d990326677318fd1427139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8861 5372 bytes
font_01_sfnt_off00009aca.bin
7798d7cf81e332560cf116be885e7845486157228025fb8cf2528de6dd5409c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ACA 10212 bytes
font_02_sfnt_off0000bdaf.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDAF 4324 bytes

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