Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3df28f087fb380…

MALICIOUS

PDF

121.7 KB Created: 2020-08-10 03:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd3249a19a578e368867ba2f6b5136ff SHA-1: ab06639e87ace45478cab824b4af93204b9e930b SHA-256: 3d3df28f087fb380167011664dd17ca81f3dac976320eb97c36c74022b5304c4
152 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.cc'. This URL is also present in the document body, disguised as a book download. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=a+muralha+de+gelo+livro+pdf
    • http://files.janiktremblayhomeopathie.com/uploads/1/3/2/6/132696112/tarusipa-tunewufej-gonebenes-kesifikuzi.pdf
    • http://kefaxa.sandylien.com/uploads/1/3/0/8/130813765/xidigof.pdf
    • http://files.henhouseart.co.uk/uploads/1/3/1/4/131438323/e9a7b39d6f.pdf
    • http://files.patricknortonillustration.com/uploads/1/3/1/4/131454883/xesowunadup.pdf
    • http://files.icingonthecakebypaula.com/uploads/1/3/1/3/131398358/nanofageton-zezurowuxivi-jiraviwijidi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2519/3368/files/50218866677.pdf
    • https://cdn.shopify.com/s/files/1/0429/9119/0175/files/49881610344.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/wuzafekulik.pdf
    • https://cdn.shopify.com/s/files/1/0431/0089/7434/files/44129015595.pdf
    • https://cdn.shopify.com/s/files/1/0433/6150/1334/files/47767821558.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/72136579059.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/rufolasafogi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/3360488319.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/41060330536.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80278007767.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3639/files/metaphysical_bible_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6756/3429/files/compressed_air_engine_car.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_off00017a06.bin
4875d5ff052a7aba654d7a5b2858c6cb2694f2f3e6c1316cf48efbddc43728f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17A06 5020 bytes
font_01_sfnt_off00018b15.bin
100dafb7a0a27df17b5f5e50cda6ce5ebbc373299be7ccd61df902be2221e253		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18B15 13728 bytes
font_02_sfnt_off0001b428.bin
bfc441d837b7b3b6e145db50ef40ca26079b22b75b7d4883bc21c88ef510c1a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B428 16092 bytes
font_03_sfnt_off0001c8e0.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8E0 4324 bytes

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