Malicious PDF — malware analysis report

Static analysis result for SHA-256 98150250d43ee92c…

MALICIOUS

PDF

46.2 KB Created: 2020-08-09 23:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: facb484357c96d6da1d920350c156975 SHA-1: bb9c176887fb531c513a72a2f516c7fa06b3effb SHA-256: 98150250d43ee92c986915e411d7deaad6f1892c75b33b0fa02c36c576db77e0
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.ru). The document body, though partially corrupted, includes the same URL and references a PDF related to capital expenditure, suggesting a lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or redirection attempt.

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.ru/pify?keyword=concept+of+capital+expenditure+pdf
    • http://files.worth2000words.com/uploads/1/3/1/6/131606121/gevajogox_binipema_jilakugat_lobapupa.pdf
    • http://files.zanyunoodles.com/uploads/1/3/0/7/130739381/sikete-wemotuta.pdf
    • http://files.saydellittleleague.com/uploads/1/3/2/6/132695572/dadatozaxon_vafidagubozijo_doverufe_lolamozu.pdf
    • http://files.manxfestivalchorus.com/uploads/1/3/1/4/131438177/6181704.pdf
    • http://files.midwestfirehydrant.com/uploads/1/3/2/7/132740291/fowigo_ribasusugina.pdf
    • https://cdn.shopify.com/s/files/1/0433/5730/7039/files/sebekusizoba.pdf
    • https://cdn.shopify.com/s/files/1/0432/8754/3964/files/96955305728.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9347/files/6sn1123_1aa00_0ea1_reader.pdf
    • https://cdn.shopify.com/s/files/1/0432/2702/1480/files/71353248616.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8442/files/sosud.pdf
    • https://cdn.shopify.com/s/files/1/0436/5670/8254/files/sirivemotubipe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/josoxepevisisix.pdf
    • https://cdn.shopify.com/s/files/1/0434/6865/2697/files/botany_notes_bsc_1st_year.pdf
    • https://cdn.shopify.com/s/files/1/0428/8043/4342/files/lazopuranokopafaduwanezuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85947343199.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/1191210400.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068e4.bin
76207bb39aca8f8c7dea8aac6a2c9985fd72af14a7c67100f0ffd6b6e9e1893c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E4 4944 bytes
font_01_sfnt_off000079bb.bin
d5e8948274e24da6b3e62e2223c0748d77add1e89cc40fc4f19d8da589321c0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79BB 10544 bytes
font_02_sfnt_off00009dc8.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC8 4324 bytes

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