Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f824b97e7725e0…

MALICIOUS

PDF

49.1 KB Created: 2020-08-08 21:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f0d25ac9d82dd24a8e29e8127eced87 SHA-1: 4f3c024208c36a865ea429f092a0fba0f30b76d7 SHA-256: a3f824b97e7725e0226f01eaf287a821fe1e811bbc53cddfa219554f4c37c773
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous links, with one critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=bfs+and+dfs+in+graph+pdf'. Another heuristic indicates a link farm structure, suggesting an attempt to manipulate search engine results or distribute malicious content. The document body, though heavily obfuscated, contains references to the redirector URL and benign-looking PDF filenames, likely serving as a lure.

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=bfs+and+dfs+in+graph+pdf
    • http://files.lightonplaza.com/uploads/1/3/0/7/130775747/5855531.pdf
    • http://files.thescribblersjournal.com/uploads/1/3/2/6/132695200/xoduzigujizigunugivi.pdf
    • http://files.nnis.net/uploads/1/3/2/6/132681823/jejiva-tefuxafanobevun-sunikumurus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdf
    • https://cdn.shopify.com/s/files/1/0437/7454/1981/files/free_niv_study_bible_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/xezijenexokitajo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3380/files/26045746047.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/speer_reloading_manual_13.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0469/files/first_letter_of_each_word.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3756/files/sixteen_tons_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/wojenixexo.pdf
    • https://cdn.shopify.com/s/files/1/0450/0927/2990/files/morphology_and_syntax.pdf
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/alguien_esta_mintiendo_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/teaching_strategies_in_mathematics_for_secondary.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pigirerunozekolufis.pdf
    • https://cdn.shopify.com/s/files/1/0434/4807/4396/files/peranafekixob.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000785b.bin
51a28f8bee51e36badb07622d5a696278bc6758a91e5b718f3b7bc7ac0587fdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x785B 5320 bytes
font_01_sfnt_off00008a7a.bin
1c4bae6f70ef997e7d1fde595dd752bf28fdb1401b70c59e901a5693f2320822		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7A 13952 bytes

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