Malicious PDF — malware analysis report

Static analysis result for SHA-256 e71d70708b160bc0…

MALICIOUS

PDF

39.6 KB Created: 2020-08-18 15:38:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76455b2a331a37f24a6c4a8ffaade2cf SHA-1: b41715405a87b9b2f9adcdd60f69251752cb0771 SHA-256: e71d70708b160bc08f0b74b3a312a8b714375d15f52388130d7e5190708f32ba
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. One primary URL, 'https://ttraff.ru/pify?keyword=formwork+design+guide', is flagged as malicious. Additionally, the file exhibits characteristics of a PDF link farm, with many links pointing to Shopify-hosted PDFs, some of which are confirmed benign, but others are unknown. The document body itself is heavily obfuscated and contains the malicious URL, suggesting a lure to external content.

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.ru/pify?keyword=formwork+design+guide
    • http://files.ashlightfoot.com/uploads/1/3/1/3/131382141/sadogokulikaset.pdf
    • http://moner.ciasulli.com/uploads/1/3/1/3/131384618/tasitalivedig-tususazox-neviwen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/memew.pdf
    • https://cdn.shopify.com/s/files/1/0435/7931/0239/files/check_cpu_temp_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/3994/files/bukadufesuxubapusutu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1073/4755/files/bsc_english_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3768/files/anti_slip_grp_flooring_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8550/files/basic_commands_in_linux_with_example.pdf
    • https://cdn.shopify.com/s/files/1/0430/5446/5175/files/ponulate.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/ribbon_embroidery_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0435/5755/2277/files/souled_out_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/8009/6667/files/bipartisan_campaign_reform_act_2002.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_off00004fce.bin
21344a7b61b3500195d8aa3f67b58947ade779371a097b1944d8f5dedb1980fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FCE 4816 bytes
font_01_sfnt_off00006023.bin
c4c8d2566b5bd45eab4c7deac4b5010601c2184bb3c7abe3c5fb2b5a0afb6a28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6023 10468 bytes
font_02_sfnt_off000083e2.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83E2 4324 bytes

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