Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7084f07ef417f15…

MALICIOUS

PDF

42.1 KB Created: 2020-08-09 18:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f525c894c78e6d0e26ccc2adc283d2c3 SHA-1: 39510c8ed43347ee057fb579ea0f3e0645e71a2b SHA-256: b7084f07ef417f15aa9cfd6decc8f6e37182a4fbb24bef4f853696661e250288
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same text as the URL's keyword parameter, suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination and potentially spread the malicious redirector.

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.com/pify?keyword=method+of+payment+in+international+trade+pdf
    • http://files.slameventproduction.com/uploads/1/3/1/4/131483098/vutamolosog.pdf
    • http://files.rileytimmermusic.com/uploads/1/3/1/4/131406841/nafimasojuvuz-kedas.pdf
    • http://files.wekapo.net/uploads/1/3/1/8/131871605/juvinopukamoti-devivuvaz-sofirox-tunanupikirir.pdf
    • https://cdn.shopify.com/s/files/1/0435/9749/6477/files/sejarah_kemerdekaan_amerika_serikat.pdf
    • https://cdn.shopify.com/s/files/1/0434/6612/9574/files/black_panther_first_comic.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7253/files/tibulekuxixojoxajog.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/jedomuzufefebaxemopemate.pdf
    • https://cdn.shopify.com/s/files/1/0432/9055/8620/files/82987536728.pdf
    • https://cdn.shopify.com/s/files/1/0447/0823/3369/files/ibps_mock_test_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/29327810007.pdf
    • https://cdn.shopify.com/s/files/1/0428/0378/9991/files/41253694602.pdf
    • https://cdn.shopify.com/s/files/1/0449/9865/6158/files/2003_honda_crv_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/85983568736.pdf
    • https://cdn.shopify.com/s/files/1/0428/8770/8825/files/92540607851.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6158/files/60139088269.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_off000067f6.bin
86da55739a2102fe490e77cedbcb7cdf4d30426b0d3605a9c018b575354d1672
pdf-font-stream PDF embedded font (sfnt) at offset 0x67F6 5208 bytes
font_01_sfnt_off00007998.bin
3af6895445ab640c1e97f35581150a3bd194c203d10ed70242d063d6037d16c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7998 9880 bytes