Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ca4823cb45dfa7…

MALICIOUS

PDF

39.8 KB Created: 2020-08-06 20:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 896e27c1785cecdce1d6d7f8c367ce41 SHA-1: fce1426850365c0deb67eb79bfe4b7f286dd22e2 SHA-256: a1ca4823cb45dfa78a4de301a41baaef6a01b7e168c303cefd03721b4980d35a
120 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to manipulate search engine results, with a primary link redirecting to a known malicious URL (ttraff.cc). This indicates a likely attempt to lure users to a malicious site, potentially for phishing or malware delivery. The document body, though heavily obfuscated, contains the text 'Accounting concepts pdf download' and the malicious redirector URL, reinforcing the lure. No scripts were extracted from this sample.

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=accounting+concepts+pdf+download
    • http://files.pierceforum.org/uploads/1/3/1/6/131606162/1987591.pdf
    • http://files.antigonekoutalieri.com/uploads/1/3/1/4/131408572/gonijugagoba.pdf
    • http://files.emmakjebe.com/uploads/1/3/1/3/131383949/saderavuzosalek.pdf
    • https://cdn.shopify.com/s/files/1/0428/3065/9751/files/71968128395.pdf
    • https://cdn.shopify.com/s/files/1/0437/1008/7317/files/retujexofeziremelatugix.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/jojaboja.pdf
    • https://cdn.shopify.com/s/files/1/0434/2553/0005/files/75305503172.pdf
    • https://cdn.shopify.com/s/files/1/0434/4663/2615/files/github_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/2883/9586/files/72105699779.pdf
    • https://cdn.shopify.com/s/files/1/0435/4496/9365/files/cambridge_igcse_computer_science_programming_book_for_python.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/39949558995.pdf
    • https://cdn.shopify.com/s/files/1/0432/2036/9576/files/aakash_aiats_question_papers.pdf
    • https://cdn.shopify.com/s/files/1/0431/4818/1666/files/binapuxanufefafepisikix.pdf
    • https://cdn.shopify.com/s/files/1/0434/4102/9276/files/63468454135.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4238/files/risasolural.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0072/files/mibuluv.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_off00005de5.bin
bd9da68ecbe93d8a2d92656b24613a729c33f0a8c9176a99de737f519e6160ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE5 5308 bytes
font_01_sfnt_off00007025.bin
3d9533da6e82d0d2ac2104538286d170381cabb0f2c654728a501965466ceac8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7025 10164 bytes

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