Malicious PDF — malware analysis report

Static analysis result for SHA-256 d362c465adf4af3d…

MALICIOUS

PDF

44.3 KB Created: 2020-08-09 03:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d26615d47849689f22c078d9f625e1d6 SHA-1: 1d6e1eb36d86e8fee7bb3ed40464742d3575dd8c SHA-256: d362c465adf4af3d19b088f5e710db195a27b02446b8d60e088a34d5bdfec4dc
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, however, redirects to `ttraff.ru`, which is flagged as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to disguise a malicious redirector as a book download.

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.ru/pify?keyword=baseball+saved+us+book+pdf
    • http://tiluje.realfamilycamping.com/uploads/1/3/0/8/130814124/bawatadagabi.pdf
    • http://files.hmdegroot.com/uploads/1/3/2/3/132302859/kimegakojub.pdf
    • http://files.stephenhardie.com/uploads/1/3/0/8/130814052/8118573.pdf
    • https://cdn.shopify.com/s/files/1/0446/7975/7977/files/dragon_age_origins_rogue_specializations.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/bhagavad_gita_in_english_by_prabhupada.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/luwozavujo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1146/files/advantages_of_multilingualism.pdf
    • https://cdn.shopify.com/s/files/1/0433/3669/5959/files/comment_fusionner_2_en_un_seul.pdf
    • https://cdn.shopify.com/s/files/1/0427/9717/0847/files/vukomikelugarela.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/remowatinuvakewup.pdf
    • https://cdn.shopify.com/s/files/1/0431/2042/7157/files/wizaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0386/2440/files/xasesifiselojara.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8971/files/metexowituname.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6229/files/hierarchy_of_needs_theory_maslow.pdf
    • https://cdn.shopify.com/s/files/1/0434/1324/2014/files/collateral_management_process.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/2476282035.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_off00006f12.bin
3820221fec7b0962799fa47aec1ea445e1d2909716535ec3a187bf7e0ba378bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F12 5252 bytes
font_01_sfnt_off00008107.bin
7f9ae1c8d77d82bf4ac5f7d2e3b4db7e6ad087e1e00765e90364a40700a40a9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8107 10272 bytes