Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2848e5a62159c28…

MALICIOUS

PDF

55.7 KB Created: 2020-08-30 11:38:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f3395b81f56e6dc59b207e417f3a50e SHA-1: d4d618697b426c9ae7b807a1f36a5847e67ba920 SHA-256: b2848e5a62159c2803557565100869b08f7865ed7adc3dc7204fcfbcf2dceec8
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently displayed in the document body and identified as a malicious redirector. This link, 'https://ttraff.com/wix?keyword=modern+combat+5+obb+file+download+latest+version', is designed to lure users into downloading potentially malicious content. The PDF also exhibits characteristics of a link farm, with numerous links pointing to external resources, many of which are benign Shopify or usrfiles.com domains, but the primary redirector is flagged 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/wix?keyword=modern+combat+5+obb+file+download+latest+version
    • https://cdn.shopify.com/s/files/1/0431/6951/3632/files/97037121685.pdf
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/bleak_house_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/4781/3269/files/wotifebibiwoxewipokode.pdf
    • https://static.usrfiles.com/ugd/f967ac_a3ce852bc4fa4b8a99d9443b573ae695.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_f4133e48698647f4802ed392d85af751.pdf
    • https://static.usrfiles.com/ugd/9d869b_9a6ebc04f9234606826698c21b446a5b.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_098238218eeb44a09d33617074a27110.pdf
    • https://static.usrfiles.com/ugd/b8c837_308bbcb111da4e6ebd05f5c33c41ef21.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1930/files/juwenerudugix.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5947/files/39914536013.pdf
    • https://cdn.shopify.com/s/files/1/0431/0758/2106/files/industrial_revolution_inventions_list.pdf
    • https://cdn.shopify.com/s/files/1/0446/3358/7875/files/74133838227.pdf
    • https://static.usrfiles.com/ugd/18f527_298fc8da4460460c9d0548db460be61f.pdf
    • https://static.usrfiles.com/ugd/bae363_1964d3abe2a243d28effaec74993adf3.pdf
    • https://static.usrfiles.com/ugd/b8c837_980b12c992d045dd88b3a584bd450ddb.pdf
    • https://static.usrfiles.com/ugd/b8c837_34bfc55053e041deb60ee9458944597e.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b56.bin
58ecd09cf6681f7239cb9221543d78e6a8a378a2a033e2bc6caab52733130fd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B56 5376 bytes
font_01_sfnt_off00007d95.bin
49dddaa543544930169c80d10742cf71a10a90771d945bdf421e53748b1fa594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D95 2140 bytes
font_02_sfnt_off0000876f.bin
d108cbffb991b0677fa9979b1a2d74c66148b1236c7650be1d90002a35b230ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x876F 11228 bytes
font_03_sfnt_off0000ace2.bin
3f401360053e1b4d29c24019386b3079856d27c1a6fb1731fc2abffa1f8e552c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACE2 16136 bytes
font_04_sfnt_off0000c1e5.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E5 4324 bytes

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