Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bac1560c308ffe3…

MALICIOUS

PDF

42.2 KB Created: 2020-08-29 17:38:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 966428b7bf948ec881ea1455408fb5a7 SHA-1: 56207fe9203d4d46c0073ea5147e9e5e6eb88a77 SHA-256: 0bac1560c308ffe3afb18ff7035e994089be55ee73c754acfe2b9b6bce49ea77
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to a link farm designed to mimic search results for movie downloads. One of the primary URLs, 'https://ttraff.club/wix?keyword=2019+tamil+dubbed+movies++madras+rockers', is flagged as a malicious redirector. This suggests the document's purpose is to drive traffic to malicious infrastructure under the guise of providing download links.

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.club/wix?keyword=2019+tamil+dubbed+movies++madras+rockers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_99b8d2701dec48bc942afa41628ccfdb.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa7b1e0f07fe4643adc12cdd748febc5.pdf
    • https://static.usrfiles.com/ugd/b8c837_67d1206d6adb4f778f1d49ffd79c9964.pdf
    • https://static.usrfiles.com/ugd/d94ae5_444cced8d538474d9b4e17d23c1ad97c.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6396/files/badoo_premium_mod_apk_revdl.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95909873105.pdf
    • https://cdn.shopify.com/s/files/1/0448/2210/2178/files/abraham_maslow_pyramid_of_needs.pdf
    • https://cdn.shopify.com/s/files/1/0432/0939/2285/files/fufamimebarof.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/dibumenelodakasevefodad.pdf
    • https://cdn.shopify.com/s/files/1/0430/5793/8581/files/totiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7742/6584/files/pamepuzixominudoxanokad.pdf
    • https://cdn.shopify.com/s/files/1/0438/0812/9185/files/la_quinta_inn_las_cruces.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0ad4987847744cd9d878a83d8b35a12.pdf
    • https://static.usrfiles.com/ugd/ae15ca_6aba07d00b194ee6b6eb390e525c5d4a.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_off000062c6.bin
d11c7675b93b7e0fdd0762e039d33104fe7f480c28764beaed42eb68fe77fb6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x62C6 5736 bytes
font_01_sfnt_off0000762c.bin
c9b6f9afe689601efabc53d3586e5c932e5ee4481e2b07a5aa7e92c3be885e93
pdf-font-stream PDF embedded font (sfnt) at offset 0x762C 11336 bytes