Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ca8f6d214bad9a…

MALICIOUS

PDF

72.6 KB Created: 2020-08-05 18:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce6cc0af69631d1eeaf310776471c132 SHA-1: 9f565228d3dfd6bb1c14752a95536c91af613c86 SHA-256: 53ca8f6d214bad9a440694e98adc9aabf694e3374714b0b44fa2e9276e12266f
152 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.ru'. This URL is presented within the document body, disguised as a search result for 'Surat al waqiah arab latin dan terjemahannya pdf'. The PDF also exhibits characteristics of a link farm, with numerous links to Shopify domains, likely for SEO manipulation or to host further malicious content. The ML classifier strongly indicates maliciousness.

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=surat+al+waqiah+arab+latin+dan+terjemahannya+pdf
    • http://files.texasyouthjumpstart.com/uploads/1/3/1/4/131438211/laminozufaxel.pdf
    • http://files.brandsafarihunt.com/uploads/1/3/1/4/131410479/kabotex_pobek_revizufawixil_refanowoxijemid.pdf
    • http://files.snugpubcocoavillage.com/uploads/1/3/1/0/131070849/911995dd952f90.pdf
    • http://files.bookcellarlwonline.com/uploads/1/3/1/8/131860787/xejapami.pdf
    • https://cdn.shopify.com/s/files/1/0436/0113/3731/files/28758796862.pdf
    • https://cdn.shopify.com/s/files/1/0433/9200/8357/files/zuzejuxefirujomifawem.pdf
    • https://cdn.shopify.com/s/files/1/0439/9860/9566/files/gokojavevukevufowoga.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/aladdin_jr_musical_script.pdf
    • https://cdn.shopify.com/s/files/1/0437/1113/5894/files/genetic_causes_of_depression.pdf
    • https://cdn.shopify.com/s/files/1/0437/3423/7345/files/ralagaduposubiv.pdf
    • https://cdn.shopify.com/s/files/1/0436/1895/9523/files/83560724775.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/linin.pdf
    • https://cdn.shopify.com/s/files/1/0429/5101/6601/files/27125370943.pdf
    • https://cdn.shopify.com/s/files/1/0430/2559/6573/files/81242275125.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/ford_crown_victoria_repair_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/5439/0687/files/48751573346.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/pupusoriponolaziv.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/gikasa.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/smiley_face_svg.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
stream_005_off0000da8e.bin
92d049180da2b1541bb865c1784a20c9f0ec47ac88bcac67cbbdeb372d8ae6ba		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDA8E 31500 bytes
font_00_sfnt_off0000a221.bin
7edcc663bd5291699048fd87ff295dc4444aedd171a920df20d3a22a74b6653e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA221 5740 bytes
font_01_sfnt_off0000b58c.bin
0d2c0f8eb578e6191d0e57cfb17c5ae56c8758de78573edcef860123be3e6bb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB58C 11964 bytes

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