Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac7f29bbc56ce7ae…

MALICIOUS

PDF

40.1 KB Created: 2020-08-07 08:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68c16df00ba6cfc264aec45d57c933c7 SHA-1: f571656817734234b8d63e235354c161496cbf12 SHA-256: ac7f29bbc56ce7ae477aa3768a4966155f928247e00f485a9babf0bd1c5fb34d
120 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 of which point to external resources. One critical heuristic identified a link to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body text, though partially corrupted, includes a search query for a book download, indicating a lure to trick users into clicking the malicious links. The presence of numerous Shopify-hosted PDF links suggests a link farm SEO poisoning technique.

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.cc/pify?keyword=bartleby+o+escriv%25C3%25A3o+pdf+download
    • http://files.fayrenaissance.co.uk/uploads/1/3/1/8/131857540/pelidivametoguv.pdf
    • http://files.waterandseedhawaii.com/uploads/1/3/1/3/131383664/208038.pdf
    • http://files.kgarciaclassroom.com/uploads/1/3/1/4/131407061/sexitexelotebiko.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/8104826601.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/32744581164.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/totavodiwuzosowu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2031/9893/files/sync_ps3_controller.pdf
    • https://cdn.shopify.com/s/files/1/0430/6917/8017/files/oxford_english_dictionary_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/4504/3880/files/vorivuvopulepefifo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8738/1155/files/delajoxeruret.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/class_dojo_rewards.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/zixatumemiwipenejip.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/lekulajuwivigadabeloba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3218030698.pdf
    • https://cdn.shopify.com/s/files/1/0432/9799/6960/files/biblical_meaning_of_dreams_of_animals.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/where_does_league_save_replays.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_off0000503d.bin
49a2e934d35b24714580e56adecd88117ae0d0e532fb2c5983b45bf174653763
pdf-font-stream PDF embedded font (sfnt) at offset 0x503D 5696 bytes
font_01_sfnt_off00006329.bin
a1a1b6a5ba8099428538b5f51278eb7b43cbc881057869b03a64749fc99d905b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6329 9592 bytes
font_02_sfnt_off00008329.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8329 4324 bytes