Malicious PDF — malware analysis report

Static analysis result for SHA-256 8811261ffb69debe…

MALICIOUS

PDF

40.5 KB Created: 2020-08-01 09:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 302ab52e2cb5df90798a3dd907f6d109 SHA-1: d408accdbbd619648a562313449ffe79966861e0 SHA-256: 8811261ffb69debeb8953ff1f05b2e8c25ac02a140299091a8ef2c7369e398fa
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to funnel victims to a phishing or scam page. The document body itself is heavily obfuscated but contains references to the malicious URL and numerous other URLs hosted on Shopify and other domains, forming a link farm. The ML classifier strongly indicated maliciousness, supporting the presence of malicious redirection.

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.ru/pify?keyword=george+stephanopoulos+chemical+process+control+solutions+pdf
    • http://files.baragisladottir.com/uploads/1/3/1/3/131378993/c454ab86ed.pdf
    • http://files.capablecowgirl.com/uploads/1/3/0/9/130969761/753a8b283.pdf
    • http://files.anoopbrar.com/uploads/1/3/0/9/130969974/vanolimiz_finujadoxulazal_kuledi_gavunorinevede.pdf
    • http://files.thegorsebush.com/uploads/1/3/0/8/130814118/1048625.pdf
    • http://files.galesburgrescuemission.org/uploads/1/3/0/9/130969426/8513112.pdf
    • https://cdn.shopify.com/s/files/1/0440/6748/7894/files/dotuzofevi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/53194032115.pdf
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/80559803073.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/tolawatube.pdf
    • https://cdn.shopify.com/s/files/1/0437/4082/3706/files/medorumutixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/37400624384.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/3536584530.pdf
    • https://cdn.shopify.com/s/files/1/0430/4044/0471/files/15021888336.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/kunanojisubokowusox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70945418412.pdf
    • https://cdn.shopify.com/s/files/1/0437/9846/2624/files/61602911780.pdf
    • https://cdn.shopify.com/s/files/1/0437/5989/4682/files/pobila.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/xilokasajag.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_off000055cf.bin
c25dca258077db61df33fea37c6b751d64fb3ea29d8fa4aa5176c9982a0d2250		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55CF 5600 bytes
font_01_sfnt_off000068b2.bin
007310649b6c1dafd3f97128a8f0b3c547c5a712a2952e2bab58c6c6e59feb87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B2 14332 bytes

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