Malicious PDF — malware analysis report

Static analysis result for SHA-256 af29563edf0997a3…

MALICIOUS

PDF

44.0 KB Created: 2020-08-19 05:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21643597ed5bae61a29233a0f3a82459 SHA-1: 2b38973bd15df03830568039e241b041dbf2b430 SHA-256: af29563edf0997a32142a6f43d4b302ca4172cb5279da922be24f83f13aede72
154 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.com'. Additionally, it exhibits a PDF link farm heuristic, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack vector appears to be social engineering via a deceptive link within the PDF.

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.com/pify?keyword=annexure+f+format+for+passport
    • http://wumuw.bethecareerchange.com/uploads/1/3/2/6/132681352/8251781.pdf
    • http://files.isircconference2019.com/uploads/1/3/2/7/132740900/6604638.pdf
    • http://files.morningstarcommunity.church/uploads/1/3/1/0/131070161/lojodugonitite-rekadelejego-goxapujunekop.pdf
    • http://zupis.lwelcome.com/uploads/1/3/1/4/131406717/zumulazixuke_kudunaf_kizuguxixa_xefosolawaguzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/cashier_cv_sample.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8975/files/analysis_of_biological_data_2nd_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0755/7283/files/77261629101.pdf
    • https://cdn.shopify.com/s/files/1/0437/4672/1946/files/chatbot_aiml.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/10784778093.pdf
    • https://cdn.shopify.com/s/files/1/0430/9359/0167/files/dumegidovepipatolevoman.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3553/files/automatic_transmission_system_in_automobile.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2689/files/atmosfera_grupal.pdf
    • https://cdn.shopify.com/s/files/1/0441/4147/8040/files/16334092498.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/98020576266.pdf
    • https://cdn.shopify.com/s/files/1/0433/3423/8362/files/69225714931.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_off00006708.bin
a06da5d54093118ac1c21c06237731dbdf9bfea9bb54fdd0d6370a49fc17f76c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6708 5072 bytes
font_01_sfnt_off0000782e.bin
12cb7b65a38061904c4b86ad286ce763cdf0fdb54a66500edebce78641cdd43f
pdf-font-stream PDF embedded font (sfnt) at offset 0x782E 13472 bytes