Malicious PDF — malware analysis report

Static analysis result for SHA-256 12cb9b75fb343850…

MALICIOUS

PDF

42.3 KB Created: 2020-08-12 08:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e07c43730baefce00b4ecb2ddeaddef SHA-1: 4180fc5c9e52aa81826d898bcecee2506532c449 SHA-256: 12cb9b75fb343850ee0fbb52e9124d2f3f675a5f1838616ce21a3d703c149255
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious due to its inclusion of a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=calvinismo+e+arminianismo+pdf', suggesting a lure to a phishing or malware distribution site. The presence of numerous other PDF links further indicates a link farm or SEO poisoning attempt to drive traffic to malicious content.

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=calvinismo+e+arminianismo+pdf
    • http://dinofew.leandromorgado.com/uploads/1/3/1/4/131454012/dukivut_rabaxamorup_wewaroxowutiwa_rarir.pdf
    • http://files.altruswap.com.au/uploads/1/3/2/7/132710700/sapeponafe.pdf
    • http://files.staplertraining.com/uploads/1/3/1/8/131871433/6016091.pdf
    • http://ligavi.pommaz.com.au/uploads/1/3/1/0/131071157/933ae161232c0e.pdf
    • http://files.dvchoir.com/uploads/1/3/0/7/130739593/vefolovibegen_bagirebenides_keresewopaku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/2304/6568/files/majatekatuzofaxat.pdf
    • https://cdn.shopify.com/s/files/1/0435/3091/1899/files/cat_c13_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/9612/1251/files/ruud_furnace_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7545/files/tawobopejetobisogi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0982/5176/files/samsung_marketing_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/lamijetesesuvinevoniv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mafimovudowejiner.pdf
    • https://cdn.shopify.com/s/files/1/0436/2806/9017/files/cardiovascular_examination.pdf
    • https://cdn.shopify.com/s/files/1/0429/0897/5263/files/ncert_books_class_6_maths_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/42666985148.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/5000/files/dawewo.pdf
    • https://cdn.shopify.com/s/files/1/0438/7730/2427/files/26674244994.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000687f.bin
2f9c16c7b6a8869a23e7426d4bd11638c09e0492b55e82322d76ea377876df51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x687F 5152 bytes
font_01_sfnt_off000079f3.bin
5aa7d48dac575a76254ff9875f2cf0eb11696a2c171f7c890051497b16d64155		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F3 10248 bytes

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