Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c73b0deb07551b0…

MALICIOUS

PDF

90.6 KB Created: 2020-08-19 01:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a15da9b67500bba6547dab0c24abf4b SHA-1: 47d7b7f00dcb0597df510940d9ab65fbf17d26cb SHA-256: 4c73b0deb07551b0633d79c6cb9eeb72c5eeb8a6d87498f68585da69400b9d06
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that are part of a link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Cisco 2960 xr datasheet pdf' and the malicious URL 'https://ttraff.cc/pify?keyword=cisco+2960+xr+datasheet+pdf', indicating a social engineering lure. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=cisco+2960+xr+datasheet+pdf
    • http://files.wearemetamate.com/uploads/1/3/2/6/132680853/910f8c07.pdf
    • http://momoda.thevoicesproject.org/uploads/1/3/2/6/132682663/sobuse.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/39211580261.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/sowujiwiguzagitifuga.pdf
    • https://cdn.shopify.com/s/files/1/0435/7482/1019/files/22140905309.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/c_assignment_operator_overload.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6995/files/microbiology_fundamentals_a_clinical_approach.pdf
    • https://cdn.shopify.com/s/files/1/0433/3440/2216/files/22253806196.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/cara_convert_to_word_android.pdf
    • https://cdn.shopify.com/s/files/1/0436/0588/5090/files/jezogizibuximolaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/5963/4591/files/zubidorepode.pdf
    • https://cdn.shopify.com/s/files/1/0439/4031/5294/files/78116734168.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7223/files/debeniteporifuwupogono.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_off000115ee.bin
102ee5c72a1bcd10b289c160ca9f18ed8bcba6a091fc7d450bb09c16e9342492
pdf-font-stream PDF embedded font (sfnt) at offset 0x115EE 5768 bytes
font_01_sfnt_off0001297d.bin
5d96f13ae49caa14cba85c4555d0d6d8c33afa24a31ee90456a1a28034dfe45a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1297D 16920 bytes