Malicious PDF — malware analysis report

Static analysis result for SHA-256 0708ac57fd9998c1…

MALICIOUS

PDF

33.0 KB Created: 2020-08-20 07:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95c16c96756744667ccb47c7c4c6defa SHA-1: 08b64afc839facb075621bd6e0a4714b66016653 SHA-256: 0708ac57fd9998c1432e0d7da9e2fc74ac90bd2f0c15a0eae5b118469dab6eea
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector link to 'ttraff.com', indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to 'Android app maker software free online' and a URL, suggesting a lure for users to download potentially malicious content. 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.com/pify?keyword=android+app+maker+software+free+online
    • http://files.mbapierce-rex.com/uploads/1/3/1/8/131856476/mutajetesekin_javun_vizem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0451/3647/8361/files/class_11_ncert_biology_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2661/1357/files/annotation_tool_in.pdf
    • https://cdn.shopify.com/s/files/1/0438/0616/3104/files/geruwakuvenamajageku.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/verbal_behavior_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6991/files/dnd_5e_playable_races.pdf
    • https://cdn.shopify.com/s/files/1/0436/9232/7077/files/iron_maiden_font.pdf
    • https://cdn.shopify.com/s/files/1/0432/1620/8036/files/15483170413.pdf
    • https://cdn.shopify.com/s/files/1/0439/9392/3742/files/alter_ego_5_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3765/files/90583026104.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/mavodukafuditagalatetu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/mubutifimixag.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/wesul.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_off000044d9.bin
3bcfece3055b7531b880be2f8f5b302a79a4074410326ac6f843268fe61c7949
pdf-font-stream PDF embedded font (sfnt) at offset 0x44D9 5332 bytes
font_01_sfnt_off000056f5.bin
09da2371718ec7e94464a2ffeeaea3a4bf6ff83767321e48d04c3af50bedbe0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x56F5 9512 bytes