Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56021115b6913ae…

MALICIOUS

PDF

41.0 KB Created: 2020-08-30 07:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf480ba30cd3503fd61c3b5a88be8224 SHA-1: 682043fe4dc45e8b23f014460f8b1184bede2eea SHA-256: d56021115b6913ae3f5e58636b79f3627a35777f8ba1d359b2000c38de1062b8
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The primary malicious URL identified is ttraff.com, which is likely used to redirect users to a malicious site. The document body contains obfuscated text and URLs, further supporting a malicious intent.

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/wix?keyword=3d+sexyvilla+2
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/64438357177.pdf
    • https://cdn.shopify.com/s/files/1/0428/4507/7660/files/acetic_acid_reacts_with_water_to_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/9515/4069/files/zizivap.pdf
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/free_sheet_music_for_5_string_banjo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/30213426686.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c308b80a8334f6cbbac0840859dd934.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/43596722663.pdf
    • https://cdn.shopify.com/s/files/1/0432/7548/5339/files/19581986844.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0040/files/bacula_the_open_source_backup_software.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/agama_saya_adalah_jurnalisme.pdf
    • https://static.usrfiles.com/ugd/3e87bf_74645418d7214b30b3db5d8aa01d36f6.pdf
    • https://static.usrfiles.com/ugd/8a419d_aa2bd66cc83c4007b5aab99850fa7caa.pdf
    • https://static.usrfiles.com/ugd/b8c837_b88a168183e74e4495651ea79352d3bc.pdf
    • https://static.usrfiles.com/ugd/67f5f7_d622275cd14f403cb5ffb885a17f35d2.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_off00006377.bin
f73f84e3c8429886ace87ec732d9e9e7af7add5384c0fc698b760363ed64f2c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6377 5156 bytes
font_01_sfnt_off00007518.bin
fef84a1a8a4c2cd08250040b69a2d7137fd17834d69d841f7ec55fdc0b49bb53
pdf-font-stream PDF embedded font (sfnt) at offset 0x7518 10116 bytes