Malicious PDF — malware analysis report

Static analysis result for SHA-256 a584aec48f79af63…

MALICIOUS

PDF

50.8 KB Created: 2020-08-02 06:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca06987e2dd72749466161c483772c7b SHA-1: 9f3cbaa09bec0a0b67479a5c8dfd903802a8c805 SHA-256: a584aec48f79af63acda8099263825045ec3145498d0709b6e61b09dfd2c34b9
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body also contains the same URL, suggesting a lure to trick the user into clicking it. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to Shopify, likely for obfuscation. 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=sublime+text+4+release+date
    • http://files.snapeprimaryschool.com/uploads/1/3/2/6/132695734/3944a80.pdf
    • http://files.shuckinfun.com/uploads/1/3/2/8/132814387/wawipib_mugonatezebekax_vidanebaz_tagasawasifeji.pdf
    • http://files.mikaylamac.com/uploads/1/3/1/0/131069992/nogek_fokozukunajeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/4501/1112/files/jamawe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2934/9030/files/60462474713.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3756/files/kagerokegilutafepew.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/50602273111.pdf
    • https://cdn.shopify.com/s/files/1/0433/9951/2231/files/sunovavulidukoxopirowu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3350/files/sopiluxun.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/73921470439.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/kebele.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/dutinuvilizigo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8913/files/simple_file_upload.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/89535049941.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_off00007ab1.bin
d9c3aa0c0069a99cc389d9d0e357c7ee2d86fa12f0bc21ecc7054be86df65732
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB1 5036 bytes
font_01_sfnt_off00008bcc.bin
f91fe965edc18c38903217b44db8c1aa501dc1218f780bce46ddc06aa468ec87
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCC 10676 bytes
font_02_sfnt_off0000b015.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xB015 4324 bytes