Malicious PDF — malware analysis report

Static analysis result for SHA-256 84a8aa6656e92098…

MALICIOUS

PDF

44.7 KB Created: 2020-08-25 05:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2f872c5a46e4881144c47b4bdf505e5 SHA-1: f91265122e16c69dd354e0303e266107e2ca20d1 SHA-256: 84a8aa6656e920981d31b88d0bef93a31fb8140397987e41e4c1055fbefc5fee
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting PDF files, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is further obfuscated by a keyword related to cracked software. This indicates a social engineering attempt to trick users into downloading potentially malicious content by disguising it as cracked software. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.
  • 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
  • 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=ac+market+cracked+apk
    • http://files.reflectivecollections.com/uploads/1/3/1/4/131438190/davorufuzigomarari.pdf
    • http://files.cailenfu.com/uploads/1/3/1/4/131437444/rutez_wubusaxofab_kajali_zuwogor.pdf
    • http://files.wolfememorials.com/uploads/1/3/1/0/131070792/539a6ee56.pdf
    • http://files.mtmoriahlodge.org/uploads/1/3/1/6/131606260/fogufezuvuvo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/kolepemewokilizuvune.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8491/files/58666525337.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/30198264185.pdf
    • https://cdn.shopify.com/s/files/1/0435/1331/5480/files/govus.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1777/files/how_to_cheat_and_win_quixlet_match.pdf
    • https://cdn.shopify.com/s/files/1/0436/2154/8194/files/38206510421.pdf
    • https://cdn.shopify.com/s/files/1/0433/9980/7126/files/pandora_music_hacked_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9512/files/64497144183.pdf
    • https://cdn.shopify.com/s/files/1/0428/6503/3383/files/vanuda.pdf
    • https://cdn.shopify.com/s/files/1/0434/0845/7877/files/debate_topics_for_esl_students.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
font_00_sfnt_off000069b5.bin
0c8b6244fa1d9200a74ca1126a742debe21b1c26b07cb44822d98e87de64c434
pdf-font-stream PDF embedded font (sfnt) at offset 0x69B5 5060 bytes
font_01_sfnt_off00007ac3.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC3 1800 bytes
font_02_sfnt_off00008351.bin
f14c4fc0b46f2c03eabdeba931cdc594fa0f0505a95c199edfd1a4013b475b16
pdf-font-stream PDF embedded font (sfnt) at offset 0x8351 10024 bytes