Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc054317e68e2f05…

MALICIOUS

PDF

43.8 KB Created: 2020-08-19 13:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32efb24f8a10c96302dff2074db90f15 SHA-1: 3844f426d0033523f9a5b2fa0183e615479ff3eb SHA-256: bc054317e68e2f0554f40adacf526efaf8c99937232415949cdd372cd93a4720
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector (ttraff.ru). The document body also contains this URL, suggesting it's the primary lure. The presence of numerous other links, many hosted on Shopify, indicates a potential link farm or SEO poisoning tactic to distribute malicious content. 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.ru/pify?keyword=internal+ringtone++free
    • http://kirinite.359yoga.com/uploads/1/3/0/8/130814515/duxonakofifaj_baruvor_jatigisuwevamew.pdf
    • http://lexanepob.michaelsresale.com/uploads/1/3/1/3/131384635/givusurube_bobefa.pdf
    • http://files.smart-homesolutionsllc.com/uploads/1/3/0/7/130739081/wimesininekoka-penojurukur.pdf
    • http://files.smart-homesolutionsllc.com/uploads/1/3/0
    • https://cdn.shopify.com/s/files/1/0431/1656/0550/files/friedrich_nietzsche_beyond_good_and_evil_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/5924/7264/files/vimirojatinosunifukan.pdf
    • https://cdn.shopify.com/s/files/1/0434/2421/9293/files/zatimojuwavakufofepowa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/printable_calendar_august_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/supiwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1679/7857/files/boxall_profile.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/duxepixajurikipaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kenetawibonilolususede.pdf
    • https://cdn.shopify.com/s/files/1/0440/5503/6054/files/estructura_del_cerebro_humano_y_sus_funciones.pdf
    • https://cdn.shopify.com/s/files/1/0434/1815/7221/files/os_capites_da_areia.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1930/files/58759798719.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_off00006fbd.bin
477878feda769a68e6406134424b3ac3d0975e9c734a4d0dfbcf44a176121572
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBD 4692 bytes
font_01_sfnt_off00007fb7.bin
fb3d129a622fe40417e1e25b9eb60ba9c31e7117a4e1f3f2dc60221b2ac892ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB7 10192 bytes