Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14a0ef6c1013820…

MALICIOUS

PDF

44.5 KB Created: 2020-08-16 21:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2283a8e1ffeeabca4136c339d6abb61 SHA-1: 76ef901dd92ce7ad9108b4396c248a4c2ec18a81 SHA-256: e14a0ef6c10138206b3001e27fd5588807497bea1f465530d404d1db3f1ebbd3
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though heavily obfuscated, contains a reference to 'Remix os for pc android 64 bit', suggesting a lure to trick users into clicking the malicious link. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to benign Shopify domains, but the primary malicious link is clearly identified. No scripts were extracted from this sample.

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=remix+os+for+pc+android+64+bit
    • http://biliri.sandrarutter.com/uploads/1/3/1/3/131379373/3f9fc1912d34.pdf
    • http://files.wonderfulhippie.com/uploads/1/3/2/7/132740804/rujototunelup-nedugag.pdf
    • http://vuzokad.wildthingzdogmushing.com/uploads/1/3/0/8/130813528/5e6e4399.pdf
    • https://cdn.shopify.com/s/files/1/0437/5491/3943/files/nasuduwuperag.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7475/files/pow_x_n.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/54353426248.pdf
    • https://cdn.shopify.com/s/files/1/0445/5052/0996/files/importancia_de_los_anelidos.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3747/files/86710896907.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3917/files/tnpsc_portal_current_affairs_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0444/2878/7878/files/bosch_security_keypad_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2645/files/zuxovujonubaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7962/2040/files/ranomo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/gutizufawevo.pdf
    • https://cdn.shopify.com/s/files/1/0451/2923/6634/files/historia_de_los_caballeros_templarios.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/25472786734.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_off00006e4b.bin
ff65aa660e06d35d7876db4a4b56200ba679a93c2c32c416a6bbac6973c189df
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4B 5728 bytes
font_01_sfnt_off000081b9.bin
48eafb7991ec2f3914155c8dd234c73aba5df3bf85f79df6a8cf27cecbd3981b
pdf-font-stream PDF embedded font (sfnt) at offset 0x81B9 10236 bytes