Malicious PDF — malware analysis report

Static analysis result for SHA-256 3638ed2f311b0292…

MALICIOUS

PDF

44.1 KB Created: 2020-08-14 13:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb7a81e7a87dec07384360d134855182 SHA-1: 817a699c5ad79c5e9b3df1b07581bb838aee2dee SHA-256: 3638ed2f311b0292ca0ae6ccec1f77a80bfb4fdef6f2c21ae0726f01363d838f
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a large number of embedded links, many of which point to Shopify domains, likely for SEO manipulation. A critical heuristic identified a redirector link to 'ttraff.cc', which is known malicious infrastructure. The document body contains the same malicious URL, suggesting the intent is to lure the user into downloading further content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=free+spanish+color+worksheets
    • http://tupod.hunnicuttscience.com/uploads/1/3/1/4/131453574/7393553.pdf
    • http://files.andreas-skincare-bodytherapy.com/uploads/1/3/0/7/130739239/pejefoke.pdf
    • http://files.sustainablecharleston.com/uploads/1/3/0/7/130775987/1794350.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6605/files/vaxipemusixuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/xafamijewobosativedatu.pdf
    • https://cdn.shopify.com/s/files/1/0448/9094/7739/files/bingo_paper.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/mopuviraletozatilif.pdf
    • https://cdn.shopify.com/s/files/1/0436/3000/2336/files/wuwamopo.pdf
    • https://cdn.shopify.com/s/files/1/0440/5533/0981/files/my_thirty_years_backstairs_at_the_white_house.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/files/personal_statement_examples_for_university.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2584/files/47965585014.pdf
    • https://cdn.shopify.com/s/files/1/0438/7107/6520/files/buwuwunadikajofalojifel.pdf
    • https://cdn.shopify.com/s/files/1/0432/7764/8027/files/65th_bpsc_advertisement.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/zoraxebovoniwiritorok.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/dumilaposexudije.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/
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/file

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000639f.bin
4b571159e5badaf9d0e544a0d47f792ecc3d4409f022dffe406d276884d4bfb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x639F 4920 bytes
font_01_sfnt_off00007451.bin
9a40058a1e3a001ae4a84fbfd5581967592cbdd30cb81584f457d264bfe2dbaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7451 9560 bytes
font_02_sfnt_off0000951f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x951F 4324 bytes