Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da933f0b63f9a3c…

MALICIOUS

PDF

45.5 KB Created: 2020-08-23 07:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efb797e3b368b2be2d3ae33d4ae5cb1c SHA-1: be72b048cb4a67e6601ae3a3ad7a3b561a55a777 SHA-256: 4da933f0b63f9a3c609df183ad1b86cdb7ab005dfe9f36cc1d4730a94d51e2b6
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=battle+cats+mod+apk+2019+ios'. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility of the malicious redirector. No scripts were extracted, but the document body and heuristics strongly suggest a social engineering lure.

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/pify?keyword=battle+cats+mod+apk+2019+ios
    • http://files.privatetourssanfrancisco.com/uploads/1/3/0/9/130969818/xeguzo_falusix_verilupovumisaf.pdf
    • http://dinanigu.truthministryaz.org/uploads/1/3/1/8/131871717/f71a6c3.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5784/files/galarian_forms_rumors.pdf
    • https://cdn.shopify.com/s/files/1/0431/6302/5559/files/absite_surgery_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7487/1711/files/carcassi_op_60.pdf
    • https://cdn.shopify.com/s/files/1/0434/6380/3046/files/landslide_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0432/7555/0873/files/76091301924.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/40066638483.pdf
    • https://cdn.shopify.com/s/files/1/0429/4223/4791/files/livaxiniditufifijaladod.pdf
    • https://cdn.shopify.com/s/files/1/0438/5223/4917/files/windows_7_genuine_activator_key_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/9476/8792/files/application_form_for_partner_visa_australia.pdf
    • https://cdn.shopify.com/s/files/1/0438/4869/5958/files/wow_classic_onyxia_reset.pdf
    • https://cdn.shopify.com/s/files/1/0431/8537/3333/files/59405465250.pdf
    • https://cdn.shopify.com/s/files/1/0448/3887/9392/files/4267991703.pdf
    • https://cdn.shopify.com/s/files/1/0434/9535/8624/files/git_ssh_permission_denied_publickey.pdf
    • https://cdn.shopify.com/s/files/1/0437/9472/7074/files/futoduzemopel.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000733c.bin
78b108c793d712c5915928dcfafc1a5ba9c0b5ba99b9afd7387324a078829d28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x733C 5720 bytes
font_01_sfnt_off0000869f.bin
16fb295a2312ac70f19224bbc099f202e9964f758045a60cba21bbd114f85cd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x869F 10128 bytes

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