Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b31924821d9a511…

MALICIOUS

PDF

73.7 KB Created: 2020-08-04 10:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c49acf2ae76bf7ec537f94a362eaa8f SHA-1: 711616314e16a50a5e427a73a8b51c3eacce6842 SHA-256: 0b31924821d9a511a688754a8e64099f63eb553be121dfc63d48522d1daf29ae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, many of which are hosted on domains associated with link farms and redirectors. The primary malicious URL, 'https://ttraff.cc/pify?keyword=forensic+anthropology+pdf', is flagged as a malicious redirector, indicating an attempt to lead the user to harmful content. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is designed to deliver a malicious payload or redirect users to malicious sites.

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.cc/pify?keyword=forensic+anthropology+pdf
    • http://files.supportarlingtoncenter.org/uploads/1/3/0/8/130814900/kefut-tixetedudowi-kakapozobix-gonab.pdf
    • http://files.a1middletowntentsevents.com/uploads/1/3/0/8/130874347/pakari-momojopot.pdf
    • http://files.faceoftulsa.com/uploads/1/3/0/7/130739204/madala-rovixi-fubunimalak-gusub.pdf
    • http://files.federicabruni.com/uploads/1/3/1/3/131381919/195876.pdf
    • http://files.maisonmelki.com/uploads/1/3/1/3/131383791/logoledo_besewej_gufatun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/33788580547.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6415/files/wifesenuzimewupofiwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/toxafupelefid.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/70760581369.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45865267400.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/zoten.pdf
    • https://cdn.shopify.com/s/files/1/0431/1656/0550/files/27358287703.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/jowakoviwilejajifup.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3912/files/77671031446.pdf
    • https://cdn.shopify.com/s/files/1/0432/3462/3643/files/baganijixoniledosasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0115/9575/files/calendario_de_vacinas_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/2900/2390/files/38994921181.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9401/files/71424722175.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3e4.bin
87bb80c399a47f52b7f6785136f1bd620789f95955c2e89f8c51c6a4e2651d1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E4 5472 bytes
font_01_sfnt_off0000f68a.bin
1110c53f5d4d63cb2ce92ff4a562b9758421d7d1357daf6a7bf0e604c3be2cd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF68A 10220 bytes

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