Malicious PDF — malware analysis report

Static analysis result for SHA-256 434fe6b4406bd665…

MALICIOUS

PDF

50.6 KB Created: 2020-09-13 00:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b1c1b2607ca097ee7d1feb7ad97c48a SHA-1: 77ef4ca83e6dbc3f0f51f059ddaeb6293cd26a63 SHA-256: 434fe6b4406bd6659bf6b61f68f004eb96d50f0bd42a3be25292b7aca905226c
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, disguised with a keyword related to a movie title. This suggests a social engineering lure to trick users into visiting a potentially harmful site. The PDF also hosts a large number of other PDF links, likely for SEO manipulation or to spread further malicious content. The ML classifier strongly indicated maliciousness.

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=a+quiet+place+sign+language+translation+download
    • http://files.christinetschida.com/uploads/1/3/2/6/132696598/9297720.pdf
    • http://jovevarek.dualityinteriordesign.com/uploads/1/3/1/6/131606165/lojupekuzugived.pdf
    • http://files.masterlimstkd.com/uploads/1/3/1/4/131453068/liwafupe.pdf
    • http://files.historicaldivingequipment.com/uploads/1/3/0/7/130775921/sivutonerukebe-gifovafuk-mivaguxa.pdf
    • http://fomofew.la-cooking.com/uploads/1/3/2/3/132303307/sowenapivutelibefe.pdf
    • http://files.gigglesphotographync.com/uploads/1/3/1/0/131071137/33e311.pdf
    • http://nikebiros.firstuccwarren.org/uploads/1/3/2/7/132712324/gulanawir-javewiza.pdf
    • http://files.entartetekunstliteraryreview.com/uploads/1/3/1/4/131483584/bc637a1.pdf
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/acrobat_reader_and_editor.pdf
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/wowobinudatigijefepabofe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8942/8637/files/calibration_of_weighing_balance.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6488/files/31248595875.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/conchita_ricardo_barreda.pdf
    • https://cdn.shopify.com/s/files/1/0438/8978/7048/files/top_500_albums_of_all_time.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5006/files/68706428654.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/11990866229.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_off000085c8.bin
7ff2aaec3d895fdecf98eb9da0380bdecc72d362449ae476e9f398e008aea22b
pdf-font-stream PDF embedded font (sfnt) at offset 0x85C8 5448 bytes
font_01_sfnt_off00009868.bin
a9f2481441dac1011205c3940431f891efdda818cfbcd111a830453249903bfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x9868 10760 bytes