Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b5a5dc40b259c3…

MALICIOUS

PDF

66.8 KB Created: 2020-10-28 20:59:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6183c46b1f242b5920b58c22a327d2b6 SHA-1: b9d199797bf326684fc8342859643a0b1d096bff SHA-256: 19b5a5dc40b259c3fee7557d49fc50c463252c58d65ac0ff6f9dfffee2ed8331
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains the same query string as the malicious URL, suggesting a lure. The presence of numerous external PDF links, many pointing to benign content, indicates a link farm strategy to improve SEO for the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/123?keyword=what+is+jute+made+of
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f87f254d2731.pdf
    • https://cdn-cms.f-static.net/uploads/4393883/normal_5f996cd36613f.pdf
    • https://cdn-cms.f-static.net/uploads/4391319/normal_5f92ada5043e5.pdf
    • https://cdn-cms.f-static.net/uploads/4376611/normal_5f8bdda9013bc.pdf
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5f888c9d5759c.pdf
    • https://cdn-cms.f-static.net/uploads/4387711/normal_5f95a1903660a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0480/5863/0308/files/zatarains_blackened_chicken_alfredo_cooking_directions.pdf
    • https://cdn.shopify.com/s/files/1/0503/0258/2969/files/aircrack-ng_linux_tutorial.pdf
    • https://s3.amazonaws.com/bulozor/hold_me_tight_sue_johnson.pdf
    • https://cdn.shopify.com/s/files/1/0496/5449/7443/files/tv_guide_roanoke_rapids_nc.pdf
    • https://s3.amazonaws.com/fakuguvil/2_liter_bottle_rocket_with_egg_and_parachute.pdf
    • https://cdn.shopify.com/s/files/1/0432/6627/7534/files/rusty_bucket_nutrition_guide.pdf
    • https://s3.amazonaws.com/henghuili-files/56543201989.pdf
    • https://cdn.shopify.com/s/files/1/0502/8898/4222/files/jerevaviruvezivi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5960/1830/files/93315675475.pdf
    • https://cdn.shopify.com/s/files/1/0487/0196/4438/files/metaphors_in_romeo_and_juliet_act_5_scene_3.pdf
    • https://cdn.shopify.com/s/files/1/0481/8914/5245/files/63432921516.pdf
    • https://cdn.shopify.com/s/files/1/0504/2795/3328/files/morpheus_minecraft_1.12_2.pdf
    • https://s3.amazonaws.com/wizedumi/chemistry_reference_sheet_periodic_table.pdf
    • https://cdn.shopify.com/s/files/1/0266/9192/8249/files/amsco_world_history.pdf
    • https://cdn.shopify.com/s/files/1/0499/2339/1656/files/wutalakukobal.pdf
    • https://s3.amazonaws.com/vonusirukete/what_is_the_main_purpose_of_writing_as_a_student.pdf
    • https://cdn.shopify.com/s/files/1/0482/2899/1130/files/download_revolt_2_multiplayer_mod_apk.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000adcc.bin
ee77430a38d87cddf46ddfc2dfcfd97c91c2045f6d3b5feddeb829d312ab4733		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADCC 5108 bytes
font_01_sfnt_off0000bf1a.bin
4903285f94d6a25d8ab87a5e3632100ac891bf70b55b0fcaf8c273a68afba69a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1A 11488 bytes
font_02_sfnt_off0000e5c0.bin
327a6495d8caec7663c6a03c0f21e25d16a62a4b2dd0e3a0110f5efc07fe60ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C0 16756 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.