Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f54136b47b85de…

MALICIOUS

PDF

38.0 KB Created: 2020-08-17 12:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 154273ce696ecfc6250730664d9bd6f3 SHA-1: 3893c676ab8f243039c83d292c41edabdf35aae7 SHA-256: 39f54136b47b85de02a96cc48f3504ae014aac5d1985b92166ceb1e3576c7c41
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious domain, ttraff.com, with a keyword suggesting a lure for pirated content. The document body, though heavily obfuscated, contains the same URL and other URLs pointing to Shopify, likely part of a link farm to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious.

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=kidnap+bengali+full+movie++jalshamoviez
    • http://files.hdb-door.com/uploads/1/3/1/0/131070116/76f02.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/5.pdf
    • https://cdn.shopify.com/s/files/1/0432/8095/7593/files/pabejepizik.pdf
    • https://cdn.shopify.com/s/files/1/0434/6377/0272/files/wabikusosixofojepi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6871/1321/files/fda_form_1572.pdf
    • https://cdn.shopify.com/s/files/1/0435/3209/1546/files/neropijuzazura.pdf
    • https://cdn.shopify.com/s/files/1/0434/5682/3462/files/60407513525.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98629167596.pdf
    • https://cdn.shopify.com/s/files/1/0449/7666/8831/files/corrugated_plastic_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/56569117128.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/lolakijovojajesam.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/zaded.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/power_function_java.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/2768434788.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_off000055b6.bin
eac1205228784dfaf62aea96be0bfeff67b8afaea65572ed1359a572fb8f000f
pdf-font-stream PDF embedded font (sfnt) at offset 0x55B6 5652 bytes
font_01_sfnt_off000068e2.bin
530a1051612ecf45891d6fcdc3ec2ee59509eedecc2d81435238f0fcb3c3a490
pdf-font-stream PDF embedded font (sfnt) at offset 0x68E2 10096 bytes