Malicious PDF — malware analysis report

Static analysis result for SHA-256 68aa17431cb9fd30…

MALICIOUS

PDF

58.5 KB Created: 2020-08-11 08:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c8d30d6aee6f7abb92ee3f799e4efb7 SHA-1: 948a1f90ac010918388fc77f9a988682e9a81226 SHA-256: 68aa17431cb9fd300606ca36a4c5554c468ea871592b1ae3255c949d32035d7c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, with one specifically pointing to known malicious redirector infrastructure at 'ttraff.com'. The presence of a large number of external PDF links suggests a link farm or SEO poisoning tactic, likely intended to drive traffic to malicious sites. The ML classifier also strongly flagged this document as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=engineering+drawing+agarwal+pdf+download
    • http://files.zisscustomglass.com/uploads/1/3/1/4/131408142/didalawika-sisemeredisa.pdf
    • http://jatatizu.vintagefairedecor.com/uploads/1/3/2/7/132740978/dccdebbcf86f.pdf
    • http://files.cuprodigy.com/uploads/1/3/1/4/131483830/zogidovakukuko_sigugako_ronobif.pdf
    • http://files.mobiledetailingsandiego.com/uploads/1/3/0/9/130969987/jojijagop.pdf
    • http://files.autopanelsworthing.co.uk/uploads/1/3/0/8/130874366/87ab9b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0428/1883/0503/files/kolodoxara.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/hindu_baby_boy_names_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/0497/7564/files/wusubodibijubodukirufed.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/negonir.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/falegufonadonisibo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0334/files/plex_double_nat.pdf
    • https://cdn.shopify.com/s/files/1/0429/7854/1722/files/32719386353.pdf
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/todib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70913092576.pdf
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/26099427985.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3253/files/64935558242.pdf
    • https://cdn.shopify.com/s/files/1/0440/2446/3525/files/anatomy_reference_for_artists.pdf
    • https://cdn.shopify.com/s/files/1/0434/2012/3293/files/tofiwisutogepof.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bc5.bin
0e94df8556de98b579e1c1836816d0edb5f1e7493f963d71a2626b6cd30f1ed3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC5 4788 bytes
font_01_sfnt_off00007c16.bin
5e067315a2bd9524b6254977960f062bb129990ed69868068e29b4596197f3c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C16 2320 bytes
font_02_sfnt_off00008669.bin
98ce51a17c745ced60a2469da79ef9f710b291b3c69b51990957f1205da33931		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8669 10144 bytes
font_03_sfnt_off0000a964.bin
a349519ccbdbca3d75704c2becf615ab37801eb1543272228454131dceb83acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA964 16224 bytes
font_04_sfnt_off0000beb1.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB1 4324 bytes
font_05_sfnt_off0000ccb3.bin
12939217f908c2d372150ee99b305bf9be24315871d4a68ff6866a98e17361b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB3 3632 bytes

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