Malicious PDF — malware analysis report

Static analysis result for SHA-256 af33f49cd5eba3b9…

MALICIOUS

PDF

48.6 KB Created: 2020-08-21 16:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c36f9048e673105741593718b62cfac5 SHA-1: e5b40a7adffe8cabfc7343706a1615f868b5c699 SHA-256: af33f49cd5eba3b9b0b56317b7853e1bcb83dfe59b939b9d7a65c8d9240e5899
150 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'. This URL is presented within the document body, disguised as 'Olbg sports betting tips apk'. The PDF also contains a link farm heuristic, indicating an attempt to distribute content widely. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link.

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.com/pify?keyword=olbg+sports+betting+tips+apk
    • http://files.countryweddingsatcrookedriverfarm.com/uploads/1/3/1/4/131453431/xiputeri_sitekupa.pdf
    • http://xabuvobi.clclockport.org/uploads/1/3/0/9/130969953/102586ff5415.pdf
    • http://files.deeperwaterscounseling.org/uploads/1/3/1/3/131379371/8160395.pdf
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/sedujuwewudefumujowel.pdf
    • https://cdn.shopify.com/s/files/1/0448/2465/8082/files/rupijirigazojazexab.pdf
    • https://cdn.shopify.com/s/files/1/0445/4642/4991/files/aashto_m288_15.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/amend_text_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/diet_for_celiac_disease.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/salamanders_codex_supplement_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7991/7987/files/bikini_body_guide_workout_exercise_and_training_plan.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/rajibonumaxuvipetarezow.pdf
    • https://cdn.shopify.com/s/files/1/0434/1897/6408/files/79048329934.pdf
    • https://cdn.shopify.com/s/files/1/0427/9861/2636/files/sickle_cell_anemia_notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/risomujimoliminunuze.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/gelufotiraxaxorakug.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006074.bin
ce372e6497c3419f904ed55de5de63d4b9b46f10355770a182bcfd1d176a59c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6074 5008 bytes
font_01_sfnt_off00007175.bin
f5ca09a731399521e401e7abf71da43a08e1fabae9807445b55562f2255aafec
pdf-font-stream PDF embedded font (sfnt) at offset 0x7175 4252 bytes
font_02_sfnt_off00008186.bin
492b4ed3a12d746293c0e8616298bb3836ff32224a84260503d59b680fc4d0d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8186 11024 bytes
font_03_sfnt_off0000a6f7.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6F7 4324 bytes