Malicious PDF — malware analysis report

Static analysis result for SHA-256 1259371327546ebf…

MALICIOUS

PDF

134.8 KB Created: 2020-08-10 01:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 548dc9760543090629f76125f9cffd54 SHA-1: 0b530f89d2398a64514d1ab6e3be8b0beedd92fc SHA-256: 1259371327546ebf3c4a0e8dfaaa852df4f5ddc5e661663c9fc3da94643b7774
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to what appears to be a link farm designed to host malicious content. One critical heuristic identified a link to known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=food+and+beverage+cost+control+2nd+edition+pdf`. This suggests the document's primary purpose is to redirect users to malicious sites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=food+and+beverage+cost+control+2nd+edition+pdf
    • http://files.thirdcinemaproductions.com/uploads/1/3/1/3/131379749/sonazez.pdf
    • http://files.foltzcenter.com/uploads/1/3/0/8/130874316/xifunadekig.pdf
    • http://files.artandremedies.com/uploads/1/3/2/6/132695782/7505381.pdf
    • http://files.srmsperformingarts.com/uploads/1/3/2/7/132710779/tixet_farare_xuzasox_sazivenaf.pdf
    • http://files.sgfbeef.com/uploads/1/3/0/7/130739343/juvofoxiruvijaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.orgThis
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/1287/4662/files/algebra_1_exponential_functions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2791/files/gedefafipu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2035/2677/files/86970459281.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/semicolon_and_comma_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/aashto_bridge_design_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/34837608525.pdf
    • https://cdn.shopify.com/s/files/1/0446/0707/8564/files/free_sample_lease_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0440/1243/7662/files/70393394940.pdf
    • https://cdn.shopify.com/s/files/1/0433/2116/3941/files/pile_driver_sex_position.pdf
    • https://cdn.shopify.com/s/files/1/0432/2682/4863/files/sewezukevopaxawuwofudofad.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1200/files/parita.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://scripts.sil.org/
    • http://scripts.sil.org/OFLAbyssinica

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019fe2.bin
4d95caca6f73fe186e66ef67f32685e84ee6899790aae882be1026c68df897d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19FE2 5400 bytes
font_01_sfnt_off0001b258.bin
8b3cd21cdda7a0f6be45806684c4885a10655602858f3c17037373f9b7b3184d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B258 20992 bytes
font_02_sfnt_off0001d292.bin
d16dfbca273d70ba30f0701dc04c8cc4b7c9256998c422a2e068483d3f1b8539		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D292 13772 bytes
font_03_sfnt_off0001fee4.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FEE4 4324 bytes

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