Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d501fdb2b07a36…

MALICIOUS

PDF

48.4 KB Created: 2020-07-26 07:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cec3efda8f08013f6f18101e6cd8bc4e SHA-1: c894845667940df09ca435fd1d21211e13356342 SHA-256: 97d501fdb2b07a36ebade17634f063ad315755f71158edce8135e1a522606fa6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is `https://ttraff.cc/pify?keyword=active+passive+all+rules+pdf`, which is likely used to funnel victims to further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=active+passive+all+rules+pdf
    • http://files.hyggeorganic.com/uploads/1/3/1/1/131164473/1537349.pdf
    • http://files.lesliemartinart.com/uploads/1/3/1/0/131071289/12257.pdf
    • http://files.istroumahigh.org/uploads/1/3/1/3/131382239/747046.pdf
    • http://files.poplarridgecommunitycenter.com/uploads/1/3/1/3/131398279/3771043.pdf
    • http://files.katelyncostello.com/uploads/1/3/0/7/130739269/ditoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/gukoni.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/kesunasomofug.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5494/files/fafedunolixuwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/ronetutewuguxivonugopiro.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/12343611930.pdf
    • https://cdn.shopify.com/s/files/1/0437/7303/4658/files/85308893101.pdf
    • https://cdn.shopify.com/s/files/1/0434/0491/8941/files/90811836608.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/pizabamijapenuxofapojelel.pdf
    • https://cdn.shopify.com/s/files/1/0438/3608/0288/files/39684420743.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/wimufadogadakegozofaviza.pdf
    • https://cdn.shopify.com/s/files/1/0430/6737/5770/files/lofutezijawameruba.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/xukiwatuso.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007da8.bin
07e0c4a53b87236b92cf642769d8537000c58dfc3ad18651a15a7018c747747d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA8 4864 bytes
font_01_sfnt_off00008e45.bin
752f1a708d869ab445b35f5334126953dc1e45af7f893d393c224c1b8cc2bdd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E45 11708 bytes