Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a136e99342df97…

MALICIOUS

PDF

44.6 KB Created: 2020-08-12 01:26:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 070da1455bc013e00afbb402c145c376 SHA-1: 97acd8e905a0be85d5e37783732c4d2d08c474f7 SHA-256: f2a136e99342df97cf20d59815c6bab8f47fe50a449296a251da905a90bee01e
150 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and contains a critical heuristic indicating it links to a malicious redirector. The document body itself is heavily obfuscated but contains the redirector URL. The presence of numerous embedded links, many pointing to Shopify domains, suggests a link farm designed to distribute malicious content.

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.cc/pify?keyword=absorcion+y+secrecion+intestinal+pdf
    • http://files.petsittingservicesofnewburgh.com/uploads/1/3/0/7/130776033/8167346.pdf
    • http://labov.theimo.org/uploads/1/3/1/4/131483416/wemenijevesovowir.pdf
    • http://files.renewyourminddaily.com/uploads/1/3/1/0/131070356/214cc6c316521ff.pdf
    • https://cdn.shopify.com/s/files/1/0447/0036/9049/files/amoreta_knjige.pdf
    • https://cdn.shopify.com/s/files/1/0432/4897/6027/files/admonitions_of_ipuwer.pdf
    • https://cdn.shopify.com/s/files/1/0435/3474/5760/files/duxete.pdf
    • https://cdn.shopify.com/s/files/1/0430/8051/5738/files/firefox_backup_bookmarks.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/gujemaduguwumupusan.pdf
    • https://cdn.shopify.com/s/files/1/0433/4413/4294/files/refipolefuwimipax.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/pomikuliwabodetotufe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/51414095931.pdf
    • https://cdn.shopify.com/s/files/1/0439/0692/4712/files/61258297196.pdf
    • https://cdn.shopify.com/s/files/1/0428/7509/3159/files/pitekaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17418425376.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8136/files/jiratalifikaze.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/daturum.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_off00007136.bin
66c74310d30fe84f8457f6848230d026481211e1ba5622a254c1ac41336ab56f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7136 5380 bytes
font_01_sfnt_off00008385.bin
9c828e942b1611254864603cd6e0356bb1dce09b98d0985606b876b29bc9d9e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8385 10012 bytes

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