Malicious PDF — malware analysis report

Static analysis result for SHA-256 41e54885eb85846f…

MALICIOUS

PDF

44.7 KB Created: 2020-08-21 04:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fae3c9cc7546c4fb050d78f2ecee7dec SHA-1: 697242af590ab1c17fbd08c2249579a6bd73f7f8 SHA-256: 41e54885eb85846f95d227fcb394fc77572a9bc53787ca7cf75c2185b493f5d1
152 Risk Score

Malware Insights

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

The PDF contains a lure related to 'basic automobile engineering book pdf free' and embeds multiple links. One of these links, 'https://ttraff.cc/pify?keyword=basic+automobile+engineering+book+pdf+free', points to known malicious redirector infrastructure. The document appears to be a link farm designed to drive traffic to potentially malicious sites, leveraging SEO-like lures.

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=basic+automobile+engineering+book+pdf+free
    • http://pizefolu.megannasto.com/uploads/1/3/0/8/130813108/buzone.pdf
    • http://tubufa.inspiredinksbymadeline.com/uploads/1/3/2/8/132814838/nebujuvesizef.pdf
    • http://jovuk.primrosehillpto.org/uploads/1/3/1/4/131453850/13603a3fae1a2e2.pdf
    • http://pajoje.visionsusa.org/uploads/1/3/1/4/131406893/sotawovuwafu_sibetodokadef_situso.pdf
    • https://cdn.shopify.com/s/files/1/0434/4253/6598/files/fekevex.pdf
    • https://cdn.shopify.com/s/files/1/0429/6930/1151/files/9259944867.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8885/files/feposatupuvowutut.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3204/files/14705786923.pdf
    • https://cdn.shopify.com/s/files/1/0433/0615/6190/files/51032258675.pdf
    • https://cdn.shopify.com/s/files/1/0429/2457/2835/files/famivalemewunim.pdf
    • https://cdn.shopify.com/s/files/1/0433/8352/1445/files/xazirelupatigevalovako.pdf
    • https://cdn.shopify.com/s/files/1/0441/3915/1512/files/best_time_servers.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/fuwejafibujibigov.pdf
    • https://cdn.shopify.com/s/files/1/0431/4955/7917/files/deconvolution_in_seismic_data_processing.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005792.bin
4d838073b8fbe8aec356705dab616a0fdd29cb9adc3c24fa485057f306215cd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5792 5608 bytes
font_01_sfnt_off00006a79.bin
33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A79 2116 bytes
font_02_sfnt_off00007443.bin
feca8dc6633f43747c9cc5cece6312be496e303469be09ef0c7858e9dd636e74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7443 10280 bytes
font_03_sfnt_off0000973c.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x973C 4324 bytes

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