Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a16e594c3bbcf4…

MALICIOUS

PDF

51.8 KB Created: 2020-08-21 07:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34e0e97db523a89ac750766add3ad304 SHA-1: 67e4a4c7b86c1ac06eb2c73b54628399f04da442 SHA-256: 01a16e594c3bbcf4d146a777c97ba33fc9b1a6579eae7015a28a2110912d358b
194 Risk Score

Malware Insights

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

The PDF document contains a prominent link to 'ttraff.ru', identified as a malicious redirector, which is likely intended to deliver a payload. The document body also contains the text 'Granny v 1.7.3 mod apk', suggesting a lure to trick users into clicking the malicious link. The presence of numerous other PDF links, many pointing to Shopify, indicates a potential link farm or SEO poisoning tactic to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=granny+v+1.+7.+3+mod+apk
    • http://files.dnaleatherwa.com/uploads/1/3/0/7/130738814/8327209.pdf
    • http://files.h-mun.com/uploads/1/3/1/3/131379296/tofazaduf.pdf
    • http://gujofura.instituteforcreativemindfulness.com/uploads/1/3/1/6/131606349/rivij_kijed_xeduwizorufono.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/22876961502.pdf
    • https://cdn.shopify.com/s/files/1/0432/9259/0236/files/graphic_design_services.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruxejuvekega.pdf
    • https://cdn.shopify.com/s/files/1/0435/4949/1359/files/dusokataduwi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2529/1674/files/78275800280.pdf
    • https://cdn.shopify.com/s/files/1/0432/5533/3027/files/nawidaxixasofu.pdf
    • https://cdn.shopify.com/s/files/1/0462/9502/3776/files/lara_s_theme_sheet_music_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0431/9523/6509/files/pusozowekorelawatila.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://www.gnu.org/licenses/gpl.html

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bff.bin
aff11289bf87f92bc53c0e2abc335208e29b6db8a954e82fd0a5595ffa95d344		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFF 2880 bytes
font_01_sfnt_off0000663d.bin
37726f653db8d57ea46d2d45134267956ed4f9e6925cde099579b7dc6fc447ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x663D 5020 bytes
font_02_sfnt_off0000773a.bin
de30df5f5c65b13a46296b8967e79b4be3f58150976c60e74f1eb4feafd73656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773A 9088 bytes
font_03_sfnt_off00009056.bin
1bd4cff83d0356fffaa71ffdf99fa05e273791f8ce0ac9dd29ee9a63a18f2180		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9056 10364 bytes
font_04_sfnt_off0000b3e4.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E4 4324 bytes

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