Malicious PDF — malware analysis report

Static analysis result for SHA-256 8883215f7393c4d0…

MALICIOUS

PDF

39.9 KB Created: 2020-08-31 23:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e35fac9717c309bc9f92fbd18e9a390 SHA-1: 6f1109e7c1bdefd90d1de02b97c6e5673a835cc9 SHA-256: 8883215f7393c4d00424a12d317bbd228a0ff159d4a4eab446705e2b2a2f8dc4
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a movie title, which is a common lure for phishing or malware delivery. The ML classifier strongly indicated maliciousness, and the PDF was flagged for linking to known malicious infrastructure. The document body, though heavily obfuscated, contains the visible lure text and the malicious URL.

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/wix?keyword=beeruva+2015+telugu+full+movie
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/zekelode.pdf
    • https://cdn.shopify.com/s/files/1/0435/7783/5681/files/65806128676.pdf
    • https://cdn.shopify.com/s/files/1/0438/3847/2357/files/dukegikaramasuwotuxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3212/4312/files/kiposanomezetobotuki.pdf
    • https://cdn.shopify.com/s/files/1/0437/1608/3877/files/73084601860.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/android_messages_for_web_not_showing_up.pdf
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/gizagivi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/ap_computer_science_2016_free_response.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/madagojekibujijunatojedo.pdf
    • https://cdn.shopify.com/s/files/1/0439/9605/3662/files/87846105437.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/bupuzepikogu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5955/8053/files/wirilumu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/ketomituz.pdf
    • https://cdn.shopify.com/s/files/1/0436/6984/8217/files/rexujafidelirixad.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005060.bin
ddb92555e40e3a5353b375763367afa7abaf5de2f6e836198bac5e3503840fdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x5060 5244 bytes
font_01_sfnt_off0000624b.bin
b6100d2dd568236d12f773967b2d24839cd87f77064230d191b885ae87dae2a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x624B 10008 bytes
font_02_sfnt_off0000849a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x849A 4324 bytes