Malicious PDF — malware analysis report

Static analysis result for SHA-256 090a75227bbefc09…

MALICIOUS

PDF

41.5 KB Created: 2020-08-10 01:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65655cf4aee932125619f6d1c6d589cb SHA-1: 700ad6b0ac4699ed833fff015a35cbcdc11260ee SHA-256: 090a75227bbefc099fb4a1ca868f90fbef493ce8df9cc15e8f7c922cf07758ad
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm behavior with numerous external links, many of which are to benign Shopify domains but some are unknown. The ML classifier also strongly flagged this PDF as malicious. The embedded link likely serves as a lure to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=ph%25E1%25BA%25A7n+m%25E1%25BB%2581m+c%25E1%25BA%25AFt+n%25E1%25BB%2591i+file+pdf+tr%25E1%25BB%25B1c+tuy%25E1%25BA%25BFn
    • http://xorider.colleenitani.com/uploads/1/3/1/4/131452836/509cce.pdf
    • http://files.wild-woodbury.org/uploads/1/3/1/4/131453396/19338a0.pdf
    • http://files.acadianaplumbersassociation.com/uploads/1/3/2/7/132710601/patemoxew-zewiwepogasose-nokaz-pawivemobim.pdf
    • http://files.oceanpinesmotel.com/uploads/1/3/1/6/131606453/xegijeduvimepip-zumusirokud-jetofofija-zamamefoguni.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/7004/3813/files/88515108286.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/79108997784.pdf
    • https://cdn.shopify.com/s/files/1/0437/7100/3037/files/81443394535.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/sejarah_batik_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/biocentrismo_ambiental.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/furupokexopaxabisovijuwu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/85619936121.pdf
    • https://cdn.shopify.com/s/files/1/0436/0414/8382/files/11749846363.pdf
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/77968172836.pdf
    • https://cdn.shopify.com/s/files/1/0433/6333/6350/files/56438436161.pdf
    • https://cdn.shopify.com/s/files/1/0454/6150/4152/files/sujikenewosedinifez.pdf
    • https://cdn.shopify.com/s/files/1/0438/5721/5648/files/81374939392.pdf
    • https://cdn.shopify.com/s/files/1/0432/7679/6057/files/7936267367.pdf
    • https://cdn.shopify.com/s/files/1/0444/8036/4711/files/danoxatositevosidezi.pdf
    • https://cdn.shopify.com/s/files/1/0450/6664/9750/files/basic_question_of_f_b_service.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_off00005fb8.bin
8ec741612d944b6c09151491166409c65eca7275c60d2ecf890f92304c9255bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB8 6308 bytes
font_01_sfnt_off00007371.bin
420c6ff186123fa9106d16c70884eb337ab158bb9aabef5e2927fab98d276b69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7371 10384 bytes

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