Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16b9985b77b0525…

MALICIOUS

PDF

55.5 KB Created: 2020-08-07 12:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b9811934799afe65d67c3fbc06155cb SHA-1: f56d20a9c3382070eb9d00513f8121b73c24fb88 SHA-256: a16b9985b77b05255583f717ee59ca6f10d13fc15879b2d6ecb686b03b40f807
120 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 external resources, indicating a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=diccionario+biblico+unger+gratis+pdf'. The document body, though heavily corrupted, appears to contain text related to a Bible dictionary, likely a lure to disguise the malicious intent. The presence of numerous Shopify-hosted PDF links suggests an attempt to obscure the ultimate destination or to leverage a trusted domain for hosting malicious content.

Heuristics 3

  • 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.
  • 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=diccionario+biblico+unger+gratis+pdf
    • http://files.shopelevateonline.com/uploads/1/3/1/4/131437953/kelima-dodedal-zoxowu.pdf
    • http://files.thaisrussomano.com/uploads/1/3/1/3/131381839/1092220.pdf
    • http://files.dmdesignsoc.com/uploads/1/3/0/7/130739616/wolelodaziligi-wokejog-zafurebetefo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/12714491420.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/lupuxo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/nokaxuxigobaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37629755229.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3952/files/sorekativuzujajeguji.pdf
    • https://cdn.shopify.com/s/files/1/0433/9010/7815/files/chaos_druids_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6741/files/mutumuwevezo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0963/7533/files/84063764159.pdf
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/adding_and_subtracting_algebraic_fractions_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46150969179.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_off00005b59.bin
9de5262c1249c19b8727eba031eea117bc7ef07835a24b8b95dda70ca24fb278
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B59 7080 bytes
font_01_sfnt_off0000733c.bin
c90840ba537a949134f22d6e84ed4e873388c016e0d1beac7b5533d550b84955
pdf-font-stream PDF embedded font (sfnt) at offset 0x733C 5464 bytes
font_02_sfnt_off000085dc.bin
7381ec30147e28ee9e418f0b306cfa6708075969178384ca670441b769ea455b
pdf-font-stream PDF embedded font (sfnt) at offset 0x85DC 16320 bytes
font_03_sfnt_off0000b8b3.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B3 16312 bytes