Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf82cd220fb78cf…

MALICIOUS

PDF

36.2 KB Created: 2020-09-03 11:13:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c591c2d980863b353b6ecac682447fc7 SHA-1: 6082eb198bbe7c04d84dfc739d825da7877c699d SHA-256: 4cf82cd220fb78cfb257d46820f34a00f1831b896abad3bdb0d6b26f98895025
152 Risk Score

Malware Insights

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

The PDF file contains a prominent link to a redirector URL, disguised as a song download. This URL, 'https://ttraff.me/wix?keyword=aashiqui+2+all+song+remix++pagalworld', is flagged as malicious and likely serves as a lure to a secondary malicious site or phishing page. The document also contains a large number of embedded links, many pointing to benign PDFs on Shopify, but the primary malicious redirector is the key indicator of compromise.

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=aashiqui+2+all+song+remix++pagalworld
    • https://static.usrfiles.com/ugd/fb83f1_76fb0b6ee4284f9f997a95d08abd1c83.pdf
    • https://static.usrfiles.com/ugd/1d64af_4f010da12a3447f09353a9d11e17f220.pdf
    • https://static.usrfiles.com/ugd/0251f0_8b7b8013cd2b43ee8aec937fac0750a4.pdf
    • https://static.usrfiles.com/ugd/32acb1_eb76181a3ca94220bfb5ecdb0bd729e1.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/fakikexoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/2344/0804/files/33510940653.pdf
    • https://cdn.shopify.com/s/files/1/0432/3649/1431/files/tekosugikidozezipa.pdf
    • https://cdn.shopify.com/s/files/1/0438/8922/9979/files/suxuzub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/1999/files/boot_camp_ing_windows_support_software.pdf
    • https://cdn.shopify.com/s/files/1/0437/6304/0408/files/pathfinder_ironfang_invasion_players_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/61211343013.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/nufogobili.pdf
    • https://static.usrfiles.com/ugd/930050_b4b106bd3d8e41fa98debffe4377bed7.pdf
    • https://static.usrfiles.com/ugd/740d8c_f48c19f0e4e24022af564f9cf0c1f5bd.pdf
    • https://static.usrfiles.com/ugd/0047a4_1bc8dca3ac5348b691bc0829bc61aa73.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_off00004dc2.bin
6dc57b664e3b61ad5c43f45f0e434ce7c20ee75898647d7eb42741d403f07906
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DC2 5780 bytes
font_01_sfnt_off00006152.bin
ef4ba0117c4fbd2e948cb53344125fb89be61eef39df5cc3b8cbc651428fda40
pdf-font-stream PDF embedded font (sfnt) at offset 0x6152 10144 bytes