Malicious PDF — malware analysis report

Static analysis result for SHA-256 78d3005926b6422d…

MALICIOUS

PDF

45.9 KB Created: 2020-09-04 15:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e05d2cfb120c7542c43784dd93a4bac SHA-1: a56c6df86f01887e6339f5b42c2ae345215fef90 SHA-256: 78d3005926b6422dac33c4fc0df65e86836574bfdcbc5d3c2b47f6d963c736f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a user guide, which is a common lure for phishing or malware delivery. The ML classifier strongly indicated maliciousness, supporting the presence of malicious links.

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.link/wix?keyword=ergobaby+infant+insert+user+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0441/2666/6904/files/error_communicating_with_rocket_leag.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/98022427159.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/74559897733.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/nezifofivafasezites.pdf
    • https://cdn.shopify.com/s/files/1/0439/2851/8824/files/77216561352.pdf
    • https://cdn.shopify.com/s/files/1/0463/5158/1350/files/32238148374.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2217/files/embed_power_bi_report_in_dynamics_365.pdf
    • https://cdn.shopify.com/s/files/1/0434/7530/4612/files/79362489549.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9944/files/wujuwikizudukitewejapoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58657968950.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/22542469070.pdf
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/tixoxipuzerezulodagukaruk.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2374/files/psquare_busy_body_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/9733/3664/files/work_reference_letter_for_landlord_template.pdf
    • https://cdn.shopify.com/s/files/1/0452/1564/5856/files/91969018245.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/38136403490.pdf
    • https://cdn.shopify.com/s/files/1/0434/6193/5261/files/jufezakofunepiwamoxojej.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/27712766413.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051d3.bin
9394ec84717fb00eb2367eef20c31950c656023907c649cac0e465d5ffe26e66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51D3 5124 bytes
font_01_sfnt_off0000634b.bin
ea7163f812a5b14a7732346f24053bd1e1e9bb510827e195075e816c52e707cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634B 9900 bytes
font_02_sfnt_off00008557.bin
f0406f8caea753d6e85877bb79d5bffc070628cb70b4ca7a47dccb6851f2375c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8557 16072 bytes
font_03_sfnt_off000099e6.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99E6 4324 bytes

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