Malicious PDF — malware analysis report

Static analysis result for SHA-256 812bfe8ea5e9d13c…

MALICIOUS

PDF

40.4 KB Created: 2020-08-31 09:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06f7cd6ac7029be0be681e2079aa2fb0 SHA-1: a27ef6d9f911c6ea7e9bec4874551e8e554188eb SHA-256: 812bfe8ea5e9d13c9c566d9e2064c0f4d757c7b05e639b616689e0a9f10d6e9e
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a political map and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious classification.

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=political+map+of+usa+printable
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/nipus.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7675/files/nitisitogogetorufigekal.pdf
    • https://cdn.shopify.com/s/files/1/0462/7241/3856/files/one_reporting_a_fight_crossword_clue.pdf
    • https://static.usrfiles.com/ugd/b8c837_e83933a8ccff41bcb65acf3b89c9b470.pdf
    • https://static.usrfiles.com/ugd/9e41f0_806bdda9a6fb404f8ad181b3d5386990.pdf
    • https://static.usrfiles.com/ugd/a298ce_2534a14c1c00446384e7f5cce68790cf.pdf
    • https://static.usrfiles.com/ugd/83d902_c8ae84fdfec3405094dda8faf19b70b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b5ebd256dde43ee9e7d590fd8e33569.pdf
    • https://static.usrfiles.com/ugd/b8c837_fef08631cb184895a3de57d13cc79efe.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_4c628e18a29b46b8a03251e82112a77b.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kozaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4410/1544/files/tamolimogegagujusepenut.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6119/files/65728272604.pdf
    • https://cdn.shopify.com/s/files/1/0435/9385/9231/files/advantages_and_disadvantage_of_internet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/falodegod.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_off0000616a.bin
b66963c0645ef8e29e0b36d446e8865a99e711b4199a05ae172c9f505bc81f1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x616A 5300 bytes
font_01_sfnt_off00007357.bin
17b442b1e82df7101de1b39d40b71f8026db250935b9c5be59f0c2fbeb16a3a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7357 9948 bytes