Malicious PDF — malware analysis report

Static analysis result for SHA-256 146455941a34e1eb…

MALICIOUS

PDF

54.6 KB Created: 2020-08-10 03:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f54accd5dbffcda4a9fab0178134bac SHA-1: 82f51e5d456212877fc58e7b159fddfc44ef8cea SHA-256: 146455941a34e1ebfac98efe3b05bb51e94abf2b1b183ea6d290fa03bcd650a4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to a link farm hosted on Shopify, which is a strong indicator of SEO poisoning or malicious link distribution. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc', which is used to obscure the final destination. The ML classifier also strongly flagged this PDF as malicious.

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=ratio+analysis+project+report+on+bank+pdf
    • http://files.carisambasoccer.com/uploads/1/3/0/8/130813079/4953797.pdf
    • http://files.wildroseeducation.com/uploads/1/3/2/3/132303270/ludabekasopebumemeri.pdf
    • http://dezewafo.victorialrudolph.com/uploads/1/3/0/8/130813528/nokitura.pdf
    • http://files.cocewl.org/uploads/1/3/0/8/130874526/cf3022.pdf
    • http://files.morrissuperherorun.org/uploads/1/3/0/8/130813516/6465846.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/6086/9785/files/convert_characteristic_function_to.pdf
    • https://cdn.shopify.com/s/files/1/0434/8474/1798/files/sabiti.pdf
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/giseduwenolukiku.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0861/files/220835938.pdf
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/lumifobagi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6623/6826/files/70197284743.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/how_to_read_a_person_like_a_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9713/files/riluxofisi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6995/4456/files/can_t_hear_anything_in_discord.pdf
    • https://cdn.shopify.com/s/files/1/0438/2703/6322/files/99349316878.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5923/files/86734388306.pdf
    • https://cdn.shopify.com/s/files/1/0438/0655/6320/files/rasokutud.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000950f.bin
daae0d3e7fdc2b13c36b73ae9711a53328453f91e64a92e9edc24843ce60fdd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x950F 5540 bytes
font_01_sfnt_off0000a807.bin
c5e90063128981902ff43240abe1e6b6e38a2784fa9d62dd8cb117691b98fe34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA807 10796 bytes

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