Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c193078313f59e3…

MALICIOUS

PDF

45.8 KB Created: 2020-09-01 19:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5d91361d1db179df84b7dc6596692a6 SHA-1: 457b9358157a64f9ff656b503a4f5be8da149675 SHA-256: 9c193078313f59e355b00faba6c97cbf699cc40df83ade3cb166119c71184369
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and static.usrfiles.com. One critical heuristic identified a link to a known malicious redirector infrastructure at `https://ttraff.me/wix?keyword=asphalt+8+car+upgrade+guide`. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site. 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.me/wix?keyword=asphalt+8+car+upgrade+guide
    • https://cdn.shopify.com/s/files/1/0437/9305/5904/files/15644422885.pdf
    • https://cdn.shopify.com/s/files/1/0441/3010/7544/files/lewesinerawowevobipuwof.pdf
    • https://cdn.shopify.com/s/files/1/0434/3277/1750/files/42724341451.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/85126977743.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/ratere.pdf
    • https://static.usrfiles.com/ugd/b8c837_65e21b207f954b5aa20bf575f0bf44ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbf61614925c45b59beeea5a0c209236.pdf
    • https://static.usrfiles.com/ugd/99a8f2_91bed25bacaf47d0935f04a07be5f9a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_6da74e8f44b24e0db7789090bd81443f.pdf
    • https://static.usrfiles.com/ugd/38bf1f_b2717c24aa9d4859b76fd4212c02ff66.pdf
    • https://static.usrfiles.com/ugd/3b0c81_1a26c9210a2c4a33987a72408bf1582c.pdf
    • https://static.usrfiles.com/ugd/b13fd1_b3d855328a204147a3f3d8be42ae4b22.pdf
    • https://static.usrfiles.com/ugd/89064d_e45e9960a53141a6b1ff3a87f5a98633.pdf
    • https://static.usrfiles.com/ugd/dd4472_b59ccc01d9b84714b3bb9d38db21cb2c.pdf
    • https://static.usrfiles.com/ugd/60933b_4b5a24ee8d314cbb878a260365d8a73b.pdf
    • https://static.usrfiles.com/ugd/b8c837_13cec9d0f67f43a7acac605aaaaa5d1e.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_off00007262.bin
093106f82cadc1e8328d5477c35be93dd170d3930a817ce397fb0491edb358a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7262 5520 bytes
font_01_sfnt_off00008519.bin
045180465333bcb752d1e409ae3486def74dbe6c1c5c24d07ff9388f0aca276f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8519 11068 bytes