Malicious PDF — malware analysis report

Static analysis result for SHA-256 84416d04568bbfca…

MALICIOUS

PDF

53.0 KB Created: 2020-08-09 21:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 196eab1b864164b4c1cb742e041e0c72 SHA-1: 52153448417bf77305322b84cbd4af8881ec32fd SHA-256: 84416d04568bbfca43da25c82be3223d27a13fb5b04dfe9458f27b186cc99c54
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector to 'https://ttraff.ru/pify?keyword=accounting+golden+rules+pdf+download'. The document body, though heavily obfuscated, contains text related to accounting and PDF downloads, suggesting a lure for users seeking such content. The ML classifier also 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.ru/pify?keyword=accounting+golden+rules+pdf+download
    • http://files.headrushtv.com/uploads/1/3/1/4/131482975/7058301.pdf
    • http://files.aliceandhenrynaturals.com/uploads/1/3/1/4/131408256/8618153.pdf
    • http://files.adacpa.com/uploads/1/3/2/6/132681443/1bca7d74.pdf
    • http://files.theamericanbeaner.com/uploads/1/3/0/8/130814226/3252967.pdf
    • http://files.satiramquarleschristiananthologies.org/uploads/1/3/0/9/130969403/rejazegenavu_tinagix_fowivilebe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6557/files/87829544248.pdf
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/44764306472.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1073/files/fijiwelemonuxudivelif.pdf
    • https://cdn.shopify.com/s/files/1/0440/5205/4181/files/43269604649.pdf
    • https://cdn.shopify.com/s/files/1/0434/8136/6693/files/91736474329.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/fewop.pdf
    • https://cdn.shopify.com/s/files/1/0446/5885/1993/files/map_of_drangleic.pdf
    • https://cdn.shopify.com/s/files/1/0434/7419/0498/files/vufewuguf.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/setotino.pdf
    • https://cdn.shopify.com/s/files/1/0431/0722/1658/files/89349249019.pdf
    • https://cdn.shopify.com/s/files/1/0430/5672/6165/files/zivudisedo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3447/files/dukazixaduditinimefitefe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/49985396339.pdf
    • https://cdn.shopify.com/s/files/1/0434/9257/3334/files/77678686560.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/40864996088.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/
    • https://cdn.shopify.com/s/fil

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000662b.bin
72ea17f85d442c6ef04929883cb31c262f8c3f7454fc96353235b6f589ea3310		 pdf-font-stream PDF embedded font (sfnt) at offset 0x662B 5284 bytes
font_01_sfnt_off00007837.bin
ebb53aaa465c39afaadec5595902c0349cf5badbb550e78a8f6ceaca7cd8de68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7837 13200 bytes
font_02_sfnt_off0000a204.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA204 4324 bytes
font_03_sfnt_off0000b004.bin
645cd4228e94b062f4ee43fad5d6a93826d01153b51145afddfaea1f373e4be5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB004 6252 bytes

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