Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa2729547781435…

MALICIOUS

PDF

36.3 KB Created: 2020-08-21 18:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27497f34e48781df5533d75cb84aa05b SHA-1: 7c9d614d4bddf10f2bec0a84074ab637eb4a06df SHA-256: afa2729547781435aea32527e10fd1daad5065f43413dbd2a8bfa77421d66307
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, https://ttraff.cc/pify?keyword=bollywood+actress+wallpaper+hd, which is designed to lure users to potentially harmful content. The document also hosts a large number of external PDF links, many pointing to shopify.com, suggesting a link farm or redirection strategy. The ML classifier strongly indicated maliciousness, and the PDF structure itself contains a malicious redirector link.

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=bollywood+actress+wallpaper+hd
    • http://files.friscotxfencing.com/uploads/1/3/1/1/131164313/tobefi_mugunoverowor_repupavu_zululek.pdf
    • http://gilebo.nicolecrespo.com/uploads/1/3/2/7/132740435/varufobewe_rinomokes_luvatexegozo_zakunixekisa.pdf
    • http://rufon.citasonlinepasaporte.com/uploads/1/3/1/0/131070872/7169814.pdf
    • http://files.midwestskiesrock.com/uploads/1/3/1/3/131384081/6825637.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/50208552998.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/78960521300.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/holy_bible_app_king_james_version.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/bubifisujukoxibofome.pdf
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/vodek.pdf
    • https://cdn.shopify.com/s/files/1/0435/4880/3227/files/66947365464.pdf
    • https://cdn.shopify.com/s/files/1/0432/4553/5400/files/53334992491.pdf
    • https://cdn.shopify.com/s/files/1/0454/0337/3736/files/vawoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/powevaligerodirikep.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1632/files/lekedatis.pdf
    • https://cdn.shopify.com/s/files/1/0440/2610/1925/files/admin_template_github.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/
    • https://cdn.shopify.com/s/files/1/0440/2610/1925/files/admin_templ

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005153.bin
0c39b3a772e35187cce1d11ba13a07070ff4e2cfeec377fef4497db8f77921fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x5153 5404 bytes
font_01_sfnt_off000063c2.bin
6daf961a120916185b43357ca2dfaf99b69ba8f71afc267769a134de80acceca
pdf-font-stream PDF embedded font (sfnt) at offset 0x63C2 9460 bytes