Malicious PDF — malware analysis report

Static analysis result for SHA-256 808f0923c386ff43…

MALICIOUS

PDF

44.4 KB Created: 2020-08-31 06:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d94a4f563cc87bdadedc601d8bb42b51 SHA-1: b58f3a745c08774fe46c7e9989b8190227436efc SHA-256: 808f0923c386ff43ae5232d77b8464e7ca757b4ccb3b9fee20d960ab90036950
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=everway+rpg+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which lead to benign Shopify URLs, but the primary redirector is suspicious. The document body, though heavily obfuscated, also contains the malicious URL.

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/wix?keyword=everway+rpg+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/oxford_phonics_world_1_the_alphabet_student_book.pdf
    • https://cdn.shopify.com/s/files/1/0464/6351/6824/files/arabian_horse_facts_information.pdf
    • https://cdn.shopify.com/s/files/1/0437/7572/1633/files/sinanoxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/55149359917.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/74148506263.pdf
    • https://cdn.shopify.com/s/files/1/0431/4192/2982/files/tasixedubox.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/5879706740.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53940500656.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/instant_root_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/1551/9912/files/40536739492.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/56267420971.pdf
    • https://static.usrfiles.com/ugd/15d534_18c8dea5bc4e4a3c92593c77b90ee00b.pdf
    • https://static.usrfiles.com/ugd/824332_65dca40ce6bf4012b3dfc7506171e1b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_085437aa8ead483f82bd694a5c504171.pdf
    • https://static.usrfiles.com/ugd/6846fe_07af9f5672c1444dab2de9a0381b0f63.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070ff.bin
3963ea5daa5fe514cddf6d9ce18a40b96b00f45837ce4a2b52fa2e21ae2872f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x70FF 5208 bytes
font_01_sfnt_off000082e3.bin
49d2c8e4d6e847b4406820598fef75e1de305094ee91977825cdbbb7f1e5f85d
pdf-font-stream PDF embedded font (sfnt) at offset 0x82E3 10076 bytes