Malicious PDF — malware analysis report

Static analysis result for SHA-256 d942663aa98a6847…

MALICIOUS

PDF

58.3 KB Created: 2020-08-06 18:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5e24f08b7a4b51933354cdf30222d85 SHA-1: 75e72ddf14ac42f3fa7042aa481ad20b2a42529e SHA-256: d942663aa98a6847416857a9066d24255877b4cd1e8dd46bb4e9383b15033b8e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains a significant number of embedded links, identified as a link farm, directing to various PDF files hosted on Shopify and other domains. One of these links, 'https://ttraff.cc/pify?keyword=series+of+unfortunate+events+austere+academy+pdf', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document is likely used for SEO manipulation or to distribute further malicious content.

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=series+of+unfortunate+events+austere+academy+pdf
    • http://files.carriekellerequineart.com/uploads/1/3/0/8/130874278/xogus_vokamo.pdf
    • http://files.youliedance.com/uploads/1/3/0/7/130739076/tibobebog.pdf
    • http://files.halobonline.com/uploads/1/3/1/3/131380756/2db4e9e.pdf
    • http://files.gracepeaceandtruth.com/uploads/1/3/1/3/131380308/1279560.pdf
    • https://cdn.shopify.com/s/files/1/0437/6707/0877/files/60948225701.pdf
    • https://cdn.shopify.com/s/files/1/0435/4870/4917/files/guide_de_conversation_anglais_franais.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/xibekalefuw.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/equinox_columbus_circle_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/29137920957.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5494/files/birds_names_in_english_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0429/9934/9407/files/antropologia_biologica.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/jepiluworem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdf
    • https://cdn.shopify.com/s/files/1/0431/6508/9941/files/piwavedezonadeso.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/bujemofe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000679e.bin
0eeb2fe2ca74291fb04310e7b1088a310ff43af31126f50449a2b1de90d88dfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x679E 5560 bytes
font_01_sfnt_off00007b25.bin
21837995365e6194d0bfcaf6eb0f360899c98c2676552375be04ad519fd23f66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B25 5416 bytes
font_02_sfnt_off00008d7b.bin
9a9d3db83173cd35f63081fb0494720794324c7878f0defa3c52f4c8ba1d862e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7B 11280 bytes
font_03_sfnt_off0000b3b5.bin
f2a23964ac1aa51a7759fc94937e8efbe47e5f27d540ae45e122304a662e9a98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B5 17252 bytes
font_04_sfnt_off0000cd10.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD10 4324 bytes

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