Malicious PDF — malware analysis report

Static analysis result for SHA-256 31db311e7212f4af…

MALICIOUS

PDF

63.3 KB Created: 2020-08-28 13:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd1c31b86060846b109abc56a8078028 SHA-1: 7eb3ad947e15b4bb1d645d861cd8d7992d31ad85 SHA-256: 31db311e7212f4aff55ab4056b30080f7c82b98aa0933742b5671f2f59742af1
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=apb+reloaded+trophy+guide'. The document body, though partially corrupted, contains text related to 'Apb reloaded trophy guide', suggesting a lure to entice users to click the malicious link. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm designed to obscure the ultimate malicious destination.

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.com/pify?keyword=apb+reloaded+trophy+guide
    • http://files.quietlyjudging.com/uploads/1/3/0/8/130813094/1527474.pdf
    • http://nupetabo.filipinocursillosf.org/uploads/1/3/0/8/130813077/044d0.pdf
    • http://files.en.associates.artmark.com/uploads/1/3/2/6/132680822/f6622ec881.pdf
    • http://riran.schwartzhundrottweilers.com/uploads/1/3/0/7/130775432/funorebife.pdf
    • http://files.ok123plus.com/uploads/1/3/2/7/132741225/528c070d29.pdf
    • https://cdn.shopify.com/s/files/1/0428/9639/2348/files/zisakulutamesedixum.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4604/files/dixas.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/74052293439.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/briggs_and_stratton_repair_manual_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0432/1177/files/gutigefuxoxu.pdf
    • https://cdn.shopify.com/s/files/1/0436/6955/3305/files/jifeminagarupexosamibo.pdf
    • https://cdn.shopify.com/s/files/1/0445/7247/5556/files/jaxugemejej.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/27676995566.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/don_juan_canto_1_themes.pdf
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/gosekisumawekugipob.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_off0000ba5a.bin
d6c16a32365a5dc70cd6f64f04a67cfc27a21ca1cf2e3c4f3592fed0add2a077
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA5A 5272 bytes
font_01_sfnt_off0000cc39.bin
a69571aae014e6e4b408ab4217b8494d01b66946d95c3523181f952b0179596f
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC39 10588 bytes